bridle of the mother, a figurative name for a chief city, as in 2 Samuel 8:1 , "David took Metheg-ammah out of the hand of the Philistines" (RSV, "took the bridle of the mother-city"); i.e., subdued their capital or strongest city, viz., Gath ( 1 Chronicles 18:1 ).

These dictionary topics are from
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition,
published by Thomas Nelson, 1897. Public Domain, copy freely.