preflight adjective 2noun 2verb 1forms 3 adjective2 •Taking place before the start of a flight. •Serving to confirm that requests can be accepted, before sending an actual request. noun2 •An inspection of an aircraft before the start of a flight. •The portion of the movement after launching from the springboard but before pushing off the vault. verb1 •To perform an inspection of an aircraft before the start of a flight. formspreflighted · preflighting · preflights