- The definition of autumn is the season of the year that comes between summer and winter.
An example of Autumn is the months of October and November.
An orchard in autumn.
autumn definition by Webster's New World
- the season that comes between summer and winter; fall: in the astronomical year, that period between the autumnal equinox and the winter solstice
- any period of maturity or of beginning decline
Origin: Middle English autumpne ; from Old French autompne ; from Classical Latin autumnus, auctumnus; probably of Etruscan origin, originally
autumn definition by American Heritage Dictionary
- The season of the year between summer and winter, lasting from the autumnal equinox to the winter solstice and from September to December in the Northern Hemisphere; fall.
- A period of maturity verging on decline.
- Of, having to do with, occurring in, or appropriate to the season of autumn: autumn foliage; autumn harvests.
- Grown during the season of autumn: autumn crops.
Origin: Middle English autumpne, from Old French autompne, from Latin autumnus.
- au·tumˈnal adjective
- au·tumˈnal·ly adverb