/ Dictionary / Index G greenhorn: Meaning and Definition of Find definitions for: green•horn Pronunciation: (grēn'hôrn"), [key] — n. an untrained or inexperienced person. a naive or gullible person; someone who is easily tricked or swindled. a newly arrived immigrant; newcomer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: greenhorn (Thesaurus) green heron greenhouse Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language