This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

interjection. Used to catch someone's attention.

interjection. Used to urge on hounds in a hunt.

n. A shout or call of "halloo.”

verb-intransitive. To shout "halloo.”

v. To urge on or pursue by calling "halloo” or shouting.

v. To call out to.

v. To shout or yell (something).

interjection. Used to greet someone, or to catch their attention

interjection. Used in hunting to urge on the pursuers

n. A shout of halloo

v. To shout halloo

n. A loud exclamation; a call to invite attention or to incite a person or an animal; a shout.

verb-intransitive. To cry out; to exclaim with a loud voice; to call to a person, as by the word halloo.

v. To encourage with shouts.

v. To chase with shouts or outcries.

v. To call or shout to; to hail.

interjection. An exclamation to call attention or to encourage one. Now mostly replaced by hello.

An exclamation used to call the attention of a person at a distance, or in hunting to incite the dogs.

To cry out; call with a loud voice; shout; cry, as after dogs.

To call or shout to; incite or chase with shouts and cries of “Halloo!”

To cry aloud; utter with shouts.

n. A call, cry, or shout uttered to attract attention, or as a signal, as in hunting to urge on the dogs.

n. a shout to attract attention

v. urge on with shouts

v. shout `halloo', as when greeting someone or attracting attention

"Sophie acknowledged the fact with a grimace as, with a wave and a whooping "halloo," Clarissa shot past."

hallooed    hallooing    halloos   

call    yell    vociferation    shout    cry    outcry    incite    egg on    prod    scream   

hello   

hallooed    hallooing   

shout    hail   

holloa    scuffling    hurrah    yowl    whoop    lowing    shriller    battle-cries    hullabaloo    whinny