meaning of halloo
1. To cry out; to exclaim with a loud voice; to call to a person, as by the word halloo.
2. To encourage with shouts.
3. To chase with shouts or outcries.
4. To call or shout to; to hail.
5. An exclamation to call attention or to encourage one.
6. A loud exclamation; a call to invite attention or to incite a person or an animal; a shout.
7. a shout to attract attention; "he gave a great halloo but no one heard
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