/ Dictionary / Index W welkin: Meaning and Definition of Find definitions for: wel•kin Pronunciation: (wel'kin), [key] — n. Chiefly Literary. the sky; the vault of heaven. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: welkin (Thesaurus) welfarism well Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language