Definitions
from the GNU version of the Collaborative International Dictionary of English.
- noun (Astron.) the unit of length equal to the mean distance of the Earth from the sun, about 93 million miles (150 million kiometers); -- used almost exclusively in astronomy, or to describe astronomical distances.
Etymologies
Sorry, no etymologies found.
Support
Help support Wordnik (and make this page ad-free) by adopting the word a.u.
Examples
Sorry, no example sentences found.
Comments
Log in or sign up to get involved in the conversation. It's quick and easy.