Definition of upon in English:

upon

preposition

  • ‘it was based upon two principles’
    more formal term for on, especially in abstract senses
    ‘a school's dependence upon parental support’
    • ‘The head chef is the key foundation upon which the business is built as are all the staff.’
    • ‘I will have to travel a distance to make it there and do not want to find it closed upon arrival.’
    • ‘He is building a fan base upon the goodwill he has generated since taking over the club.’
    • ‘The pressure upon him is heavy, not least because everything is now out of his hands.’
    • ‘She had a core of inner strength and she could be relied upon if you really needed help or you were in a mess.’
    • ‘It also drew upon his undoubted gifts as a poet and his intuitive genius as an historian.’
    • ‘It's a radio show that's been going for year upon year but very few people listen to it.’
    • ‘The worrying thing is how those in power interpret the way we vote and act upon it to stay in power.’
    • ‘It is a seed of hope within what you rightly describe as a society based upon violence.’
    • ‘They look upon him as a political sage, a voice of freedom, a speaker of truth to power.’
    • ‘An American ship came to the island upon which we were being kept and we were freed.’
    • ‘I am only qualified to speak on my own behalf so that is all my opinion can be based upon.’
    • ‘He'd taken it upon himself to go to a friend's house, but did not tell us he was going.’
    • ‘This is exactly the kind of sportsmanship this great game of rugby union is built upon.’
    • ‘I take it upon myself to guide her there, and follow the signs until we reach a doorway.’
    • ‘Easter is almost upon us and with it will come the full blast of the tourist trade.’
    • ‘He has also made sure that the club has a far wider range of players to call upon.’
    • ‘Taste is based upon a certain set of assumptions about what is good or bad in the world.’
    • ‘Part of the city and a theme park will be built upon artificial islands on the lake.’
    • ‘It now offers a new owner the chance to build upon its past and to reawaken it as a working estate.’

Usage

The preposition upon has the same core meaning as the preposition on. Upon is sometimes more formal than on, however, and is preferred in the phrases once upon a time and upon my word, and in uses such as row upon row of seats and Christmas is almost upon us

Origin

Middle English: from up + on, suggested by Old Norse upp á.

Pronunciation

upon

/əˈpän//əˈpɑn/