/ Dictionary / Index P pilot signal: Meaning and Definition of Find definitions for: pi'lot sig"nal Pronunciation: [key] — Naut. Naut. a signal, as a flag or light, used to request a pilot. a signal to indicate that a pilot is on board. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pilot raise pilot station Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language