/ Dictionary / Index N neem: Meaning and Definition of Find definitions for: neem Pronunciation: (nēm), [key] a product of the seeds of a tropical tree, Azadirachta indica, of the mahogany family, that disrupts reproduction in insects, used as an insecticide. Also calledthe tree itself. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: neem (Thesaurus) Néel Neenah Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language