/ Dictionary / Index E evolutionary: Meaning and Definition of Find definitions for: ev•o•lu•tion•ar•y Pronunciation: (ev"u-l'shu-ner"ē or, esp. Brit., ē"vu-), [key] — adj. pertaining to evolution or development; developmental: the evolutionary origin of species. of, pertaining to, or in accordance with a theory of evolution, esp. in biology. pertaining to or performing evolutions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: evolutionary (Thesaurus) evolution evolutionary biology Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language