Definition of autorotate in English:

autorotate

verb

[no object]
  • 1(of an object) rotate spontaneously as a result of a surrounding flow of moving air or water.

    ‘seeds with double-winged shapes managed to autorotate’
    1. 1.1 (of the rotor blades of a helicopter) rotate without engine power during a descent.
      ‘the rotors don't need to autorotate during an emergency landing’

Pronunciation

autorotate

/ˌɔːtəʊrəʊˈteɪt/