ˈȯ]d.əm, ˈä], ]təm\ noun
( -s )
Usage: often attributive
Etymology: Middle English autumpne, from Latin autumnus
1.
a. : the season between summer and winter reckoned astronomically as extending from the September equinox to the December solstice
b. : the season comprising the months of September, October, and November — called also fall
c. Britain : the season comprising the months of August, September, October
d. : the season reckoned astronomically in the southern hemisphere as extending from the March equinox to the June solstice
2. : time of full maturity or incipient decline : latter portion : third stage
the autumn of life
3. : a moderate olive brown that is darker and very slightly greener than the typical or average olive brown