/ Dictionary / Index S SLBM: Meaning and Definition of Find definitions for: SLBM Pronunciation: [key] sea-launched ballistic missile. submarine-launched ballistic missile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Slayton SLCM 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