/ Dictionary / Index S Sealab: Meaning and Definition of Find definitions for: Sea•lab Pronunciation: (sē'lab"), [key] — n. any of several experimental U.S. Navy underwater habitats for aquanauts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. seal sea ladder Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language