Boyd’s Bible Dictionary:
(little). One of the most ancient cities of Canaan, mentioned as in the “plain of Jordan” and in connection with Sodom and Gomorrah (Gen. 13:10). It was originally called Bela (Gen. 14:2,8). It was spared from the fiery destruction which came upon Sodom and the other cities of the plain (Gen. 19:20-23). Isaiah and Jeremiah speak of Zoar as in the land of Moab (Isa. 15:5; Jer. 48:34).
Concise Bible Dictionary:
One of the five cities of the plain in the land of Canaan, and which alone survived when they fell under the judgment of God. It was formerly called BELA. Lot fled to it when Sodom was destroyed, but feared to remain there (Gen. 13:10; Gen. 14:2,8; Gen. 19:22-30; Deut. 34:3; Isa. 15:5; Jer. 48:34). Identified by some with ruins at Tell esh Shaghur, 31° 50' N, 35° 40' E.
Strong’s Dictionary of Hebrew Words:
Meaning:
from 6819; little; Tsoar, a place East of the Jordan
Jackson’s Dictionary of Scripture Proper Names:
bringing low
Potts’ Bible Proper Names:
Smallness; little:―a place E. of Jordan [ZAIR], Gen. 13:10. {Parvitas}