Definition of "halloa" [hal•loa]

• Variant of halloo. (interjection)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "While we were examining the wreck we heard a distant "halloa" from the mainland."
• "The old man was only unnerved for a moment; then turning his back to the sea and putting his hands to his mouth, he gave a loud "halloa," which echoed across the silent bay, but brought no other response."
• "There came a loud cry of "halloa," and Jasper went to the window."