• WordNet 3.6
    • n mizzenmast third mast from the bow in a vessel having three or more masts; the after and shorter mast of a yawl, ketch, or dandy
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Webster's Revised Unabridged Dictionary
    • n Mizzenmast (Naut) the third mast from the bow in a vessel having three or more masts; the after and shorter mast of a yawl, ketch, or dandy.The definition varies slightly with the dictionary; in some dictionaries it is the last mast of a three-masted vessel; in others, it is the mast after the mainmast of a vessel of three or more masts. PJC.
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Century Dictionary and Cyclopedia
    • n mizzenmast The mast that supports the mizzen; the aftermost mast of a three-masted vessel.
    • n mizzenmast plural The lower-mast, topmast, and topgallantmast of the mast next abaft the mainmast.
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In literature:

He made his way to the yam sacks lashed abaft the mizzenmast and got his bottle.
"Jerry of the Islands" by Jack London
In vain Mahoney strove to get the men to take turns in watching aloft from the mizzenmast for any chance vessel.
"When God Laughs and Other Stories" by Jack London
Joseph Vincent fitted out the foremast and Thomas Briggs the mizzenmast in their lofts at the foot of the Common.
"The Old Merchant Marine" by Ralph D. Paine
Around the mizzenmast is the after-saloon, with eight cabins leading out of it.
"The South Pole, Volumes 1 and 2" by Roald Amundsen
At last a chance shot carried away her mizzenmast, and another dismounted her single great gun, killing a number of men.
"The Battle Of The Strong, Complete A Romance of Two Kingdoms" by Gilbert Parker
The fifth shot struck the mizzenmast about four feet above deck, and cut it almost away.
"Sustained honor" by John R. Musick,
The ship broached-to, and our mainmast and mizzenmast went over the side.
"Poor Jack" by Frederick Marryat
The schooner was tossed about like a toy, and the mizzenmast was sprung so that no sail could be rigged on it.
"The Moving Picture Girls at Sea" by Laura Lee Hope
Soon afterwards down came the enemy's mainmast, followed by her mizzenmast, fortunately falling over on the opposite side.
"Paddy Finn" by W. H. G. Kingston
The skipper was under the partial shelter of the mizzenmast, and clung to the belaying-pins.
"The Young Trawler" by R.M. Ballantyne