/ Dictionary / Index P PT boat: Meaning and Definition of Find definitions for: PT boat Pronunciation: [key] — U.S. Mil. U.S. Mil. a small, fast, lightly armed, unarmored, and highly maneuverable boat used chiefly for torpedoing enemy shipping. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ptarmigan PTC Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language