Definition of aero- in US English:

aero-

combining form

  • 1Relating to air.

    ‘aerobe’
    ‘aerobics’
  • 2Relating to aviation.

    ‘aerodynamics’
    ‘aeronautics’

Origin

From Greek aēr ‘air’.

Pronunciation

aero-

/ˈɛroʊ//ˈerō/