taxi

1. (aviation, slang, obsolete) An aircraft used for practicing ground manoeuvres.Examples: "Capt. Dawes and Bellairs were out with the Deperdussin taxi, and also with the brevet machine, rolling."; "... some similar untidy pile of what had been a school biplane is recorded to have acted the part of red rag to the bull of a "taxi" monoplane , which despite its driver's efforts insisted on charging and trampling on the battered fragments."; "Mr. E. B. Bauman (new pupil) joined school and had first lesson on No. 2 taxi."countableobsoleteslanguncountable

2. (aviation, uncountable, countable) The movement of an aircraft across an airport's surface under its own power; a phase of aircraft operation involving this movement.Examples: "During taxi, the flaps and slats are extended and the second engine (if not already running) is started."; "Seat belts must be kept fastened during taxi, takeoff, turbulence, and landing."countableuncountable

3. (South Africa, Iran) Synonym of shared taxi.Synonyms: shared taxiIranSouth-Africacountableuncountable