/ Dictionary / Index C cosset: Meaning and Definition of Find definitions for: cos•set Pronunciation: (kos'it), [key] — v.t. to treat as a pet; pamper; coddle. —n. a lamb brought up without its dam; pet lamb. any pet. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cosset (Thesaurus) Cossack cossie Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language