reef in the sail(s)(redirected from reefed in the mainsail)
reef in the sail(s)
To reduce the area of one or more sails while they are being used by winding them over a roller or tying them up at particular points. There's too much wind to be at full sail—it's dragging the whole boat to one side. I'll keep a steady course while you go and reef in the mainsail. We should be fine if we just reef in the jib, I think. The captain ordered us to reef in the sails before the storm hit.
See also: reef
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