noun
are
AR/ˈɑr/
A metric unit of area equal to 100 square meters.
The survey lists the garden's area as one are.

Etymology
Latin area meant a level or open piece of ground. That land-space meaning supplied the name for a standardized metric area: a square ten meters on each side.
More examples
- Ten ares equal one thousand square meters.
- The plot measures three ares.
- An are is smaller than a hectare.
Forms
are · ares