Mainmast definition

mānməst, -măst
The principal mast of a sailing vessel.
noun
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The taller mast, whether forward or aft, of a two-masted sailing vessel.
noun
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The second mast aft of a sailing ship with three or more masts.
noun
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The principal mast of a vessel: in a schooner, brig, bark, etc., the mast second from the bow; in a ketch or yawl, the larger mast nearer the bow.
noun
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(nautical) The chief, and tallest mast of a sailing ship that has more than one mast.
noun
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Other Word Forms

Noun

Singular:
mainmast
Plural:
mainmasts

Origin of mainmast