v. 25B6; verb CALL OUT, shout, cry out, yell, bawl, bellow, roar, whoop; hail, greet; informal holler, yoo-hoo, cooee.
HALLOO
Meaning of HALLOO in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012