holla
     n : a very loud utterance (like the sound of an animal); "his
         bellow filled the hallway" [syn: bellow, bellowing, holler,
          hollering, hollo, holloa, roar, roaring, yowl]

Holla \Hol"la\, interj. [F. hola; ho ho + l[`a] there, fr. L.
   illac that way, there. Cf. Hollo.]
   Hollo.

Holla \Hol"la\, v. i. [imp. & p. p. Hollaed; p. pr. & vb. n.
   Hollaing.]
   See Hollo, v. i.