Main definitions of of in US English:

: of1OF2



  • 1Expressing the relationship between a part and a whole.

    ‘the sleeve of his coat’
    ‘in the back of the car’
    ‘the days of the week’
    ‘a series of programs’
    ‘a piece of cake’
    ‘a lot of money’
  • 2Expressing the relationship between a scale or measure and a value.

    ‘an increase of 5 percent’
    ‘a height of 10 feet’
    • ‘Apple trees normally grow to a height of 20 to 30 feet.’
    • ‘The rise represents an increase of 36 per cent over three years.’
    • ‘The shares responded with a fall of 117.5p to 185p.’
    • ‘Male lions can attain a weight of up to 225 kg.’
    1. 2.1 Expressing an age.
      ‘a boy of 15’
      • ‘For a baby of only three months, she was remarkably heavy.’
      • ‘Almost 40 years ago, as a boy of ten, I was subjected to persistent bullying at a new school.’
      • ‘He was a man of middle age, tall with brown hair.’
      • ‘A thin woman stepped out of another room, a baby of six or seven months balanced on her hip.’
  • 3Indicating an association between two entities, typically one of belonging.

    ‘the son of a friend’
    ‘the government of India’
    ‘a photograph of the bride’
    with a possessive ‘a former colleague of John's’
    • ‘Detective Superintendent Parkinson said they were keen to trace the owner of a black car parked outside the West End Bar.’
    • ‘He was about five years older than me but I knew him as he was the son of one of my mum's friends’
    • ‘Back in the early 1960s, the government of Italy decided to set up an agency to regulate the production of wines.’
    • ‘Any strategy based on a reduction of the role of the qualified teacher is potentially disastrous.’
    • ‘The waitress who greeted me when I arrived turned out to be a former colleague of mine.’
    • ‘He is the director of the Irish Council for Civil Liberties.’
    • ‘Kevin was an old friend of Ryan's’
    • ‘He was wearing an old black silk shirt of Andy's, which was far too big for him.’
    • ‘On the cover was a photograph of an elderly couple, a man standing behind a lady with his arms wrapped tightly around her.’
    by, made by, done by, carried out by, caused by, from, in, of
    View synonyms
    1. 3.1 Expressing the relationship between an author, artist, or composer and their works collectively.
      ‘the plays of Shakespeare’
      ‘the paintings of Rembrandt’
      • ‘If you've heard the symphonies of Elgar, Walton and Vaughan Williams, these should certainly be next on your list.’
      • ‘Byzantium stands as an important symbol in the poems of Yeats.’
      • ‘Music inspired by the plays of Shakespeare was the theme for Saturday night's 10th anniversary concert.’
      • ‘His mother sang and played the songs of Cole Porter and Jerome Kern’
      • ‘At about this time Correggio travelled to Rome where he must have studied classical works and the paintings of Raphael and Michelangelo.’
  • 4Expressing the relationship between a direction and a point of reference.

    ‘north of Chicago’
    ‘on the left of the picture’
    • ‘Kentucky is the largest beef-producing state east of the Mississippi.’
    • ‘He grew up in Encinitas, a small beach town just north of San Diego.’
    • ‘The familiar chimneys of the main railway offices can be seen at the back, on the left of the picture.’
    • ‘The property is around 30 miles south of London and is near Gatwick Airport.’
  • 5Expressing the relationship between a general category or type and the thing being specified which belongs to such a category.

    ‘the city of Prague’
    ‘the idea of a just society’
    ‘this type of book’
    ‘the set of all genes’
    • ‘Two thirds of the artists were of Jewish backgrounds.’
    • ‘It was a packed house, with people of all ages enjoying a brilliant night out.’
    • ‘She also said that the issue of education had come up again and again during her consultations with voters.’
    • ‘According to myth, the city of Rome was founded by twin brothers, Romulus and Remus, in 753 BC.’
    • ‘Her mother was an attractive woman of French-Canadian descent.’
    • ‘He let out a muffled cry of pain and fell to his knees.’
    • ‘There is a serious problem with this type of book.’
    • ‘Each building will be clearly marked on a map of the city.’
    • ‘I like the idea of marriage as a life-long commitment.’
    • ‘This Government is sending a very clear and unequivocal message to the people of New Zealand.’
  • 6Expressing the relationship between an abstract concept having a verb-like meaning and a noun denoting the subject of the underlying verb.

    ‘the opinion of the directors’
    • ‘The paper has been the topic of much media speculation since the departure of its managing director several weeks ago.’
    • ‘Government officials waited in Darwin for the arrival of the vessels.’
    • ‘The thoughts of the people concerned were not taken into account.’
    • ‘There was no sound save for the howling of the wind outside.’
    • ‘Under the governing charter, all UN countries are bound to accept the decision of the 15-member council.’
    • ‘Residents are already making preparations for the arrival of the hurricane.’
    • ‘The £10,000 prize is awarded to the person who, in the opinion of the jury, has made the greatest contribution to art in the previous 12 months.’
    1. 6.1 Where the second noun denotes the object of the underlying verb.
      ‘the murder of two boys’
      ‘payment of his debts’
      ‘an admirer of Edith Wharton's work’
      • ‘I almost went home, not particularly relishing the thought of an evening in a pub full of football supporters.’
      • ‘He had nothing to do with the murder of the child.’
      • ‘There has been strong criticism of the police for moving too slowly in the investigation.’
      • ‘Van Gogh, like so many other Impressionist and Post-Impressionist artists, was an admirer of Japanese art.’
      • ‘This operation is an excellent example of how we are working with other agencies to clamp down on the selling of illegal goods.’
      • ‘But even after the deal, there would be a cash shortfall and creditors will not receive full payment of their debts.’
      • ‘75 percent of couples say that the preparation of the evening meal should be shared equally.’
    2. 6.2 Where the head of the phrase is a predicative adjective.
      ‘it was kind of you to ask’
      ‘I am certain of that’
      • ‘Well, it was kind of him to let you stay here.’
      • ‘She admits she's afraid of the dark.’
      • ‘This case would be coming to an end soon, he was sure of that.’
      • ‘Those guys won't bother you anymore - I'll make sure of that.’
      • ‘In the end, we can be certain of one thing: the future is not likely to be boring.’
      • ‘He could face up to seven years in prison if found guilty of all charges against him.’
      • ‘I am really proud of her and I am sure she will do well at college.’
      • ‘She said she panics when people are behind her and has become suspicious of men.’
      • ‘He acted out of character and is ashamed of his behaviour that night.’
  • 7Indicating the relationship between a verb and an indirect object.

    1. 7.1 With a verb expressing a mental state.
      ‘I don't know of anything that would be suitable’
      ‘they must be persuaded of the severity of the problem’
      • ‘It's a fantastic achievement, particularly when you think of the competition we were up against.’
      • ‘There is a high proportion of this electorate who are not persuaded of his leadership abilities.’
      • ‘Do you know of any grants, scholarships, or programs designed to help someone in my position?’
      • ‘What do you think of the result of today's meeting?’
      • ‘I couldn't figure out a way to convince him of my love.’
    2. 7.2 Expressing a cause.
      ‘he died of cancer’
      • ‘He died of a heart attack at the age of 58.’
  • 8Indicating the material or substance constituting something.

    ‘the house was built of bricks’
    ‘walls of stone’
    • ‘The original buildings were constructed of timber and stone masonry, covered with white-washed plaster.’
    • ‘The furniture included a forties dresser, an oval sixties coffee table and two much newer Scandinavian-style bookcases of unvarnished pine.’
    • ‘The bungalows are built of wood, concrete, and brick.’
    • ‘Pale walls of sand-colored stone encircled the town.’
    • ‘They lived in a simple house with bamboo walls and a roof made of coconut leaves.’
  • 9North American Expressing time in relation to the following hour.

    ‘it would be just a quarter of three in New York’
    • ‘I want you home by quarter of five because your grandma's coming for dinner at five.’
    • ‘We were still eating supper when Gabe knocked on the door at quarter of eight.’
    • ‘I'd love to stay here with you, but it's ten of two.’


It is a mistake to use of instead of have in constructions such as you should have asked (not you should of asked). For more information, see have


  • be of

    • Possess intrinsically; give rise to.

      ‘this work is of great interest and value’
      • ‘Sgt Brown added the cars involved were of little value with only one new vehicle being seized over the past six months.’
      • ‘The rise in the rate of suicide amongst young people is of constant concern to our agency.’
      • ‘Many of the calls were of a difficult nature from distressed families with moving reports of missing people.’
      • ‘The story was of particular interest to me as a New Zealander living in Australia.’
      • ‘They were getting historic items that they felt were of too great an importance to sell on and should be on public display.’
      • ‘The school has a number of buildings listed as being of historic interest.’
      • ‘The software will be of interest to schools and museums, as well as town planners.’
      • ‘Listen and make the other person feel that what he or she is saying is of interest to you.’
      • ‘Warrington council has recognised the building as being of historical interest.’
      • ‘Why people read what they read and watch what they watch has recently been of interest to me.’
  • of all

    • Denoting the least likely or expected example.

      ‘Jordan, of all people, committed a flagrant foul’
      • ‘How ironic, you of all people, giving someone else a lecture on how to treat friends.’
      • ‘Though he says his writing was inspired by, of all people, Mickey Spillane, I suspect that's a bit of wry humor.’
      • ‘Baise-Moi is a hardcore French art film that was banned in, of all places, France.’
      • ‘Amanda went weak with relief. He, of all men, had come to her rescue.’
  • of all the nerve

    • An expression of indignation.

      • ‘Jerry decided to give me a detailed explanation of some date he had, of all the nerve!’
  • of an evening (or morning etc.)

    • 1informal On most evenings (or mornings etc.).

      • ‘Instead of smoking six or seven cigarettes of a morning, I now make myself smoke only one.’
      • ‘She liked to spend time with me of a morning, before I walked to school and she went to work.’
      • ‘We've come to delight in having a few tealights burning of an evening.’
      • ‘I'm usually online of an evening at some point between 6.00 pm and midnight (or after depending on sleep patterns) for a couple of hours.’
      • ‘There's quite a chorus of noises because we've got ostriches and deer as well here, so there's quite a crescendo of different noises of an evening.’
      • ‘When I was growing up The Archers was a regular feature, always on in the kitchen of an evening and my sister and I were forced to keep quiet for the critical 15 minutes.’
      • ‘The menu consists solely of Thai dishes, which are delicious, beautifully prepared and reasonably priced, and which attract a large number of visitors - the rear dining area is often full of an evening.’
      • ‘The last five years have seen a marked increase in the number of people abandoning the couch for the computer screen of an evening.’
      • ‘You, on the other hand, will have loads of free time now to watch or play sport, or just go down the pub of an afternoon.’
      • ‘Thanks for confirming my long-held belief that I'm better off slowly destroying my liver than staying in of an evening.’
    • 2informal At some time in the evenings (or mornings etc.).

      • ‘Now - you MUST bring Connie over to the club for dinner of an evening soon; my wife was only talking to her last week and she was saying it's been so long since we've all eaten together!’
      • ‘We're getting the kitchen done at the moment, so much of my free time is spent packing stuff into boxes, then having to unpack the boxes to reach the food so we can actually eat of an evening.’
      • ‘I was really looking forward, for example, to having a jolly good read of an evening when the newest winner of England's Orange Prize was announced.’
      • ‘Besides, the three of you look impossibly cute when you're sat like that of an evening.’
      • ‘When you settle down in the Mancini home of an evening, what flicks tend to get you all enraptured?’
      • ‘Oh, sure, I've cringed a little when neighbours have strolled past of an evening, casting judgmental looks at the poor old place, all run-down and neglected as it was.’
      • ‘Occasionally, of an evening, I am prone to fits of activity which generally result in my strapping on the running shoes and going down to the riverbank for a jog.’
      • ‘If you're generally stuck for something to have for dinner of an evening, then hop along to The Red Kitchen and see what people there are having.’


Old English, of Germanic origin; related to Dutch af and German ab, from an Indo-European root shared by Latin ab and Greek apo.




Main definitions of of in US English:

: of1OF2


  • Old French.