• Webster's Revised Unabridged Dictionary
    • n Billyboy A flat-bottomed river barge or coasting vessel.
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Century Dictionary and Cyclopedia
    • n billyboy A flat-bottomed, bluff-bowed barge, of very light draft, especially built for the navigation of the river Humber in England and its tributaries. Sea-going billyboys are generally clincher-built and sloop-rigged, but some are canal-built and schooner-rigged. Many carry a square topsail and lee-boards. The mast is fitted to the deck by a hinge, so that it can be lowered when passing under a bridge.
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Chambers's Twentieth Century Dictionary
    • n Billyboy bil′i-boi a bluff-bowed one-masted trading-vessel.
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Chambers's Twentieth Century Dictionary
Prob. conn. with Bilander.


In literature:

Mr. Billyboy can't keep a carriage for her, but that of course is her look-out.
"Marion Fay" by Anthony Trollope
I want you to take Graylock and Billyboy till I come back.
"Maid of the Mist" by John Oxenham