/ Dictionary / Index S subtend: Meaning and Definition of Find definitions for: sub•tend Pronunciation: (sub-tend', sub-), [key] — v.t. to extend under or be opposite to: a chord subtending an arc. (of a leaf, bract, etc.) to occur beneath or close to. to form or mark the outline or boundary of. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: subtend (Thesaurus) subtenant subtenure Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language