/ Dictionary / Index S semisubmersible: Meaning and Definition of Find definitions for: sem•i•sub•mers•i•ble Pronunciation: (sem"ē-sub-mûr'su-bul, sem"ī-), [key] — n. Also calleda self-propelled barge that is mounted on partially submerged legs supported by underwater pontoons, rides at anchor, and serves as a work base and living quarters in deep offshore drilling operations. —adj. of, for, or pertaining to a semisubmersible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. semistarvation semisubterranean Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language