English Dictionary

reef

/ɹiːf/

noun

(nautical) A portion of a sail rolled and tied down to lessen the area exposed in a high wind. / A reef knot.

The coral reef is teeming with colorful fish and vibrant marine life.

意味（1）

(nautical) A portion of a sail rolled and tied down to lessen the area exposed in a high wind.

They sailed as if they were stark mad; they never took in a reef in the sail, and when the seas filled the boat, they sailed her up on the back of a wave till she stood nearly on end, the water rushing out over her stern as out of a spout.

意味（2）

A reef knot.