Jackstay definition

jăkstā
A stay for racing or cruising vessels used to steady the mast against the strain of the gaff.
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A rope, rod, or batten along the upper side of a yard, gaff, or boom to which a sail is fastened.
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(nautical) A stay (rope, bar or batten), running along a ship's yard, to which is attached the head of a square sail.
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A rope or rod running vertically on the forward side of the mast on which the yard moves.
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A rope or rod along a ship's yard, to which the edge of a sail is fastened.
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A rope or rod that runs up and down a ship's mast, along which the yard moves when being hoisted or lowered.
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Other Word Forms

Noun

Singular:
jackstay
Plural:
jackstays

Origin of jackstay