Meaning

• A yell, shout.

  "I heard a holler from over the fence."

• By extension, any communication to get somebody's attention.

  "If you need anything, just give me a holler."

Meaning

• To yell or shout.

  "You can holler at your computer as much as you want, but it won't help anything."

• To call out one or more words

• To complain, gripe