aero

UK: /ˈɛərəʊ/ US: (âr′ō)

WordReference Random House Unabridged Dictionary of American English © 2025

aer•o  (âr′ō), adj. 

1. of or for aircraft.
2. of or pertaining to aeronautics.

• aero- used as free form 1895–1900

aero-, 

1. a combining form meaning "air,'' used in formation of compound words:
   aerodrome.
   Also, aer-, aeri-. 

• Greek, equivalent. to āer- (stem of āé̄r air¹) + -o- -o-

aero., 

1. aeronautic;
   aeronautical.
2. aeronautics.
3. aerospace.

Collins Concise English Dictionary © HarperCollins Publishers::

aero / ˈɛərəʊ/ noun

1. (modifier) of or relating to aircraft or aeronautics: an aero engine

WordReference Random House Learner's Dictionary of American English © 2025

aero-, 

1. a combining form meaning "air'':
   aerodynamics.

Also, esp. before a vowel, aer-.

Collins Concise English Dictionary © HarperCollins Publishers::

aero-, aeri-, (before a vowel)aer- combining_form

1. denoting air, atmosphere, or gas: aerodynamics
2. denoting aircraft: aeronautics

Etymology: ultimately from Greek aēr air