What does ait mean?
The definition of ait
Ait, n.
Etym: [AS. ieg, ig, island. See Eyot.]

An islet, or little isle, in a river or lake; an eyot. The ait where the osiers grew. R. Hodges (1649). Among green aits and meadows. Dickens.

Ait, n.
Oat. [Scot.] Burns.