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n. Nautical
1. A stay for racing or cruising vessels used to steady the mast against the strain of the gaff.
2. A rope, rod, or batten along the upper side of a yard, gaff, or boom to which a sail is fastened.
3. A rope or rod running vertically on the forward side of the mast on which the yard moves.


1. (Nautical Terms) a metal rod, wire rope, or wooden batten to which an edge of a sail is fastened along a yard
2. (Nautical Terms) a support for the parrel of a yard



1. a rod or batten, following a yard, gaff, or boom, to which one edge of a sail is bent.
2. a rail for guiding the movement of the hanks of a sail.
References in periodicals archive ?
Antony witnessed the INS Shivalik execute various evolutions, including a 'surface gun shoot' and a Jackstay with the INS Shakti in copybook fashion.
Eventually he was joined by a Roman Catholic chaplain and the two of them used the jackstay to exchange ships.
Manoeuvre of submarines in deep blue sea, followed by jackstay, a seamanship evolution carried out in very close proximity to enable transfer of stores and personnel from one ship to another while moving through the water also lent moments of thrills to the onlookers.