- 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.
- 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 of autumnMiddle English autumpne ; from Old French autompne ; from Classical Latin autumnus, auctumnus; probably of Etruscan origin, originally
- The season of the year between summer and winter, during which the weather becomes cooler and many plants become dormant, extending in the Northern Hemisphere from the autumnal equinox to the winter solstice and popularly considered to include the months of September, October, and November; fall. In the Southern Hemisphere autumn includes March, April, and May.
- A period of maturity verging on decline.
- Relating to or occurring in autumn: autumn foliage; autumn harvests.
- Grown during the season of autumn: autumn crops.
Origin of autumnMiddle English autumpne, from Old French autompne, from Latin autumnus.
- Adonis autumnalis
- autumnal equinox
- Colchichum autumnale
- Coregonus autumnalis
- Coregonus autumnalis migratorius
- Dendrocygna autumnalis
- Epirrita autumnata
- Galerina autumnalis
- Helenium autumnale
- Leontodon autumnale, Leontodon autumnalis
- Lacus Autumni
- Leptospira autumnalis
- Leptus autumnalis
- Musca autumnalis
- Neotrombicula autumnalis
- Plegadis autumnalis
- Scilla autumnalis
- Trombicula autumnalis
- Of or relating to autumn.
- autumn leaves
- A female given name of modern usage, from the name of the season.