/ Dictionary / Index O octet: Meaning and Definition of Find definitions for: oc•tet Pronunciation: (ok-tet'), [key] — n. a company of eight singers or musicians. a musical composition for eight voices or instruments. octave (def. 4). any group of eight. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: octet (Thesaurus) octennial octillion Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language