Definition of "holler"

A yell, shout.  examples

(by extension, colloquial) Any communication to get somebody's attention.  examples

(music) A field holler.  examples

(intransitive) To yell or shout.  examples

(transitive) To call out one or more words  examples

To complain, gripe  examples

(Southern US, Appalachia) Alternative form of hollow (small valley between mountains).  examples

(dialectal, especially Southern US, Appalachia) Alternative form of hollow.  examples