/ Dictionary / Index S SSA: Meaning and Definition of Find definitions for: SSA Pronunciation: [key] Social Security Act. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ssa (Thesaurus) SS SSAE Related Content Daily Word Quiz: reluctant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language