Definition of aero in US English:

aero

adjective

informal
  • 1

    ‘an aero club’
    short for aeronautical (see aeronautics)
    ‘an aero engine’
    • ‘That in itself keeps the number of aero pilots rather small.’
    • ‘Wetting his lips, he engaged the engine, launched the wing and wire aero machine and was quickly airborne!’
    • ‘The aero squadron consisted of tour sections: headquarters, engineering, supply, and flying.’
    • ‘These men formed the backbone of the early aero squadrons and enabled army aviation to expand.’
    • ‘This man receives our highest recommendation as a professional aero tow pilot.’
    • ‘It had been removed from the aircraft and mounted on a stand inside the aero laboratory.’
  • 2

    ‘the cars have a lower, more aero front end’
    short for aerodynamic
    • ‘However, one of the issues of high-efficiency vehicles - as in a gas-electric hybrid - is aero drag.’
    • ‘‘With the new aero package,’ he says, ‘we needed a new tire to tighten up the cars.’’
    • ‘He has added four different springs and two different sway bars to help adjust to the new aero package and nose.’
    • ‘Unlike typical vehicles in that segment, the look is aero and uncluttered, sporty, not beefy.’
    • ‘Because of the wacky aero rules, drivers are relying more on their pit crews to get the cars out quickly and up front.’

Origin

Early 20th century (in aero (sense 1)): abbreviation.

Pronunciation

aero

/ˈerō/