flyby /ˈflaɪˌbaɪ/ noun5 •A flight past a celestial object in order to make observations.The upcoming flyby of Halley's comet is expected to provide new information on the nature of the comet. •(US) A low-level ceremonial flight, typically in connection with an airshow or a military parade.Two of your snot-nose jockeys did a fly-by on my tower at over 400 knots! — 1986 •A sailby performed by a hydrofoil vessel while hydrofoiling. •A three-dimensional animated sequence in which the camera moves past an object or scenery. •(figurative) A brief visit. formsflybys