Definition of autumn in US English:



  • 1The third season of the year, when crops and fruits are gathered and leaves fall, in the northern hemisphere from September to November and in the southern hemisphere from March to May.

    ‘the countryside is ablaze with color in autumn’
    as modifier ‘autumn leaves’
    figurative ‘he was in the autumn of his life’
    • ‘She said a holiday booked in the autumn of one year might be taken the following autumn.’
    • ‘It will be warmer all year round, with most of the warming taking place in the summer and the autumn.’
    • ‘In autumn when the leaves lie thick on the ground, these diligent workers sweep up and bag the leaves.’
    • ‘Come autumn, the leaf colour warms up, becoming singed with red, a real treat to witness.’
    • ‘Visit in late summer or autumn, though, and you will see this charming medieval city at its best.’
    • ‘As part of this task he travelled to the United States on a fact finding tour in the autumn of 1898.’
    • ‘Romania has hot summers, cool autumns, and cold winters with snow and winds.’
    • ‘Limit future infections by keeping excess moisture off the foliage in the autumn and winter.’
    • ‘Ohio wineries have discovered that their long autumns and late November freezes are ideal.’
    • ‘All trials were conducted in the autumn of 1996, and summers and autumns of 1997 and 1998, during the dry season characteristic of the region.’
    • ‘From the start of the autumn term in September, she will be deputy head teacher at Headlands.’
    • ‘Colorado has the most lovely summers and autumns.’
    • ‘Only once have I seen out a full summer here, many autumns I have been away, but to date I have missed only two springs.’
    • ‘He said it was given to her in the autumn of 1997, with a copy kept for the company's files.’
    • ‘In consequence the autumn colours are muted, just soft dusty yellows for the most part.’
    • ‘In the autumn of the following year I was in Dudley town centre, a place I rarely visited.’
    • ‘One touring show has fallen by the wayside since the autumn season brochures were printed.’
    • ‘In the U.K. we will have hotter springs and summers, with warm but extremely wet autumns and winters.’
    • ‘We will soon have the main autumn leaf fall on top of this, resulting in clogged up drains.’
    • ‘At 42, he is in the autumn of his career and cannot quite work out why he keeps winning.’
    decline, waning, downturn, ebb
    View synonyms
    1. 1.1Astronomy The period from the autumnal equinox to the winter solstice.
      • ‘The autumnal equinox is the day when Autumn begins and night and day are nearly the same length.’
      • ‘The Autumn Equinox marks the arrival of autumn, which will sneaking up to us this Thursday!’
      • ‘The autumnal equinox is the first day of autumn and occurs when the North Pole begins to lean away from the sun.’
      • ‘The seasons are Spring, Summer, Autumn, and Winter, with the start of each season noted as vernal equinox, summer solstice, autumnal equinox, and winter solstice.’
      • ‘At the autumnal equinox, the sun appears to cross the celestial equator, from north to south; this marks the beginning of autumn in the Northern Hemisphere.’


Late Middle English: from Old French autompne, or later directly from Latin autumnus.