mare
An adult female horse.
Other meanings
A type of evil spirit formerly thought to sit on the chest of a sleeping person; also, the feeling of suffocation felt during sleep, attributed to such a spirit.
A large, dark plain, which may have the appearance of a sea, such as those on the Moon.
Word history
From Old English "mīere" (female horse, mare).
Where this comes from
This definition is adapted from “mare” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.