(surfing, slang) A wave that breaks over a projection from the seabed formed from coral reef or rock shelf.

plural of reef knot

plural of coral reef

A mineral deposit associated with the crest of an anticlinal fold and following the bedding planes, usually found in vertical succession, especially the gold-bearing quartz veins of Australia.

plural of saddle reef

(nautical) A short line, stitched through a sail, for tying a reef

plural of reef-band

(nautical) A piece of canvas sewn across a sail to strengthen it in the part where the eyelet holes for reefing are made.

(nautical) A small rope used to reef square sails by being passed spirally round the yard and through the holes of the reef.

plural of reefing bowsprit