Definition of autumnize in English:

autumnize

verb

  • To give an autumnal appearance to.

Pronunciation

autumnize

/ˈɔːtəmnʌɪz/ /ˈɔːtəmʌɪz/

Origin

Early 19th century; earliest use found in John Knapp (1767–1845), botanist. From autumn + -ize.