/ Dictionary / Index L ligand: Meaning and Definition of Find definitions for: li•gand Pronunciation: (lī'gund, lig'und), [key] — n. a molecule, as an antibody, hormone, or drug, that binds to a receptor. a molecule, ion, or atom that is bonded to the central metal atom of a coordination compound. Cf. complexing agent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ligand (Thesaurus) ligan ligase Related Content Daily Word Quiz: overture Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language