'City gate' in the Bible

Now Gaal the son of Ebed went out and stood in the entrance of the city gate; and Abimelech and the people who were with him arose from the ambush.

Then Abimelech and the company who was with him dashed forward and stood in the entrance of the city gate; the other two companies then dashed against all who were in the field and slew them.

Now Samson lay until midnight, and at midnight he arose and took hold of the doors of the city gate and the two posts and pulled them up along with the bars; then he put them on his shoulders and carried them up to the top of the mountain which is opposite Hebron.