/ Dictionary / Index L longan: Meaning and Definition of Find definitions for: lon•gan Pronunciation: (long'gun), [key] — n. the small, one-seeded, greenish-brown fruit of a large evergreen tree, Euphoria longana, of the soapberry family, native to China and allied to the litchi. the tree itself. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: longan (Thesaurus) long-ago long-and-short work Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language