HOLLO

bellow, bellowing, holla, holler, hollering, hollo, holloa, roar, roaring, yowl

(noun) a very loud utterance (like the sound of an animal); “his bellow filled the hallway”

shout, shout out, cry, call, yell, scream, holler, hollo, squall

(verb) 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”

hollo

(verb) cry hollo

hollo

(verb) encourage somebody by crying hollo

Source: WordNet® 3.1

Etymology

Interjection

hollo

Hey, hello

Noun

hollo (plural hollos)

A cry of "hollo"

Verb

hollo (third-person singular simple present holloes, present participle holloing, simple past and past participle holloed)

To cry "hollo"

Source: Wiktionary

Hol*lo", interj. & n. Etym: [See Halloo, and cf. Holla.]

Definition: Ho there; stop; attend; hence, a loud cry or a call to attract attention; a halloo. And every day, for food or play, Came to the mariner's hollo. Coleridge.

Hol"lo, v. i. [imp. & p. p. Holloed; p. pr. & vb. n. Holloing.] Etym: [See Hollo, intery., and cf. Halloo.]

Definition: To call out or exclaim; to halloo.

Source: Webster’s Unabridged Dictionary 1913 Edition