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TOEFL BNC: 6734 COCA: 6352

reef

reef /ˈriːf/ noun
plural reefs
reef
/ˈriːf/
noun
plural reefs
Learner's definition of REEF
[count]
: a long line of rocks or coral or a high area of sand near the surface of the water in the ocean礁;暗礁;礁脉 see also barrier reef, coral reef
TOEFL BNC: 6734 COCA: 6352

reef

1 of 3

noun (1)

1
: a part of a sail taken in or let out in regulating size
2
: reduction in sail area by reefing

reef

2 of 3

verb

reefed; reefing; reefs

transitive verb

1
: to reduce the area of (a sail) by rolling or folding a portion
2
: to lower or bring inboard (a spar) wholly or partially

intransitive verb

: to reduce a sail by taking in a reef
reefable adjective

reef

3 of 3

noun (2)

1
a
: a chain of rocks or coral or a ridge of sand at or near the surface of water compare atoll, barrier reef
b
: a hazardous obstruction
2
: lode, vein
reefy adjective

Word History

Etymology

Noun (1)

Middle English riff, from Old Norse rif; probably akin to Old Norse rīfa to rend — more at rive

Noun (2)

Dutch rif, from Middle Dutch, from Old Norse, literally rib; akin to Old English ribb rib — more at rib

First Known Use

Noun (1)

14th century, in the meaning defined at sense 1

Verb

1670, in the meaning defined at transitive sense 1

Noun (2)

1584, in the meaning defined at sense 1a

Time Traveler
The first known use of reef was in the 14th century
TOEFL BNC: 6734 COCA: 6352

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