#1 hollo n. [bellow, bellowing, holla, holler, hollering, holloa, roar, roaring, yowl] a very loud utterance (like the sound of an animal); "his bellow filled the hallway". wn
#2 hollo v. encourage somebody by crying hollo. wn
#3 hollo v. cry hollo. wn
#4 hollo v. [shout, shout out, cry, call, yell, scream, holler, 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". wn
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