1. To let out a loud cry, wail, or shout. The child began howling out in pain after the doctor gave him the tetanus shot. The sound of the mob of protestors howling out in anger echoed through the streets of the city.
2. To utter or express something in a long, intense cry or shout. In this usage, a noun or pronoun can be used between "howl" and "out." Tom howled out his despair after he came home to find that his wife had left him. The crowd howled their frustrations out after the referee awarded the point to the opposing team.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.