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Meaning of preflight

pre•flight

Pronunciation: (prē-flīt'), [key]
— adj.
  1. occurring or done before a flight: a preflight briefing of the plane's crew.
—n.
  1. a preflight briefing or a ground check, as of an airplane.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.