/ Dictionary / Index C convertiplane: Meaning and Definition of Find definitions for: con•vert•i•plane Pronunciation: (kun-vûr'tu-plān"), [key] — n. a plane capable of both vertical flight like a helicopter and fast, forward speed like a conventional airplane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. convertible preferred stock convertite Related Content Daily Word Quiz: pedagogy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language