/ Dictionary / Index P pigboat: Meaning and Definition of Find definitions for: pig•boat Pronunciation: (pig'bōt"), [key] — n. Older Slang. a submarine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pigboat (Thesaurus) pig bed pig boiling Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language