Etymology: (1690–1700, Amer.; var. of holla (see hallo ))
Definition of 'holler'
Princeton's WordNet
1. (noun)bellow, bellowing, holla, holler, hollering, hollo, holloa, roar, roaring, yowl a very loud utterance (like the sound of an animal) "his bellow filled the hallway"
2. (verb)hollow, holler a smallvalley between mountains "he built himself a cabin in a hollow high up in the Appalachians"
3. (verb)holler, holler out shout out "He hollered out to surrender our weapons"
4. (verb)shout, shout out, cry, call, yell, scream, holler, hollo, squall utter a sudden loud cry "she cried with pain when the doctor inserted the needle"; "I yelled to her from the window but she couldn't hear me"
5. (verb)gripe, bitch, grouse, crab, beef, squawk, bellyache, holler complain "What was he hollering about?"