Roar, i.e. make loud outcries; either from their rage and fury against the conquered and captivated Israelites now in their power; or rather, in way of triumph for their success and victory. In the midst of thy congregations; in the places where thy people used to assemble together for thy worship; whereby they designed to insult not only over us, but over thee also, as if their gods had been too strong for thee. Signs; or, trophies, or monuments of their victories obtained over God, and over his people, as conquerors used to do in like cases.
Related Commentaries of Psalms 74:4
Psalms 74:4
4 Thine enemies roar in the midst of thy congregations; they set up their ensigns for signs.