Boyd’s Bible Dictionary:
(curb of the city). A Philistine stronghold (2 Sam. 8:1).
Concise Bible Dictionary:
Place taken from the Philistines (2 Sam. 8:1). The corresponding account in 1 Chronicles 18:1 has “Gath and her towns” (literally daughters). The signification of the name in Samuel is much disputed. Gesenius and Fürst interpret it “bridle of the mother-city.” This would well agree with “Gath and her daughter towns.”
Strong’s Dictionary of Hebrew Words:
Meaning:
from 4964 and 520 with the art. interposed; bit of the metropolis; Metheg-ha-Ammah, an epithet of Gath
Jackson’s Dictionary of Scripture Proper Names:
the bridle of a cubit
Potts’ Bible Proper Names:
The bridle of bondage; bridle of the arm:―a Philistine stronghold, 2 Sam. 8:1. {Frenum servitudinis}