Boyd’s Bible Dictionary:

In addition to the ordinary meaning, the unwalled suburbs of a walled town
(Lev. 25:31).

Concise Bible Dictionary:

A term often used in the Old Testament where a city is mentioned and “its villages,” but at times nothing more is meant than its “suburbs,” not in the sense of separate villages. The two principal words are bath, “daughter” (Num. 21:25,32); and chatser, “hamlet, encampment” etc. (Josh. 18:24,28). In the New Testament it is κώμη “village” (Matt. 9:35).