reef meaning
EN
[riːf] [-iːf] 
US WReef
- A reef is a rock, sandbar, or other feature lying beneath the surface of the water (80 meters or less beneath low water).
- Many reefs result from abiotic processes—deposition of sand, wave erosion planing down rock outcrops,
- NounPLreefsPREré-
- (Now chiefly dialectal) The itch; any eruptive skin disorder.
- (Now chiefly dialectal) Dandruff.
- A chain or range of rocks, sand, or coral lying at or near the surface of the water.
- (Australia, South Africa) A large vein of auriferous quartz; hence, any body of rock yielding valuable ore.
- (nautical) A portion of a sail rolled and tied down to lessen the area exposed in a high wind.
- A reef knot.
- (Now chiefly dialectal) The itch; any eruptive skin disorder.
- VerbSGreefsPRreefingPT, PPreefed
- AdjectiveCOMreeferCOMmore reefSUPreefestSUPmost reef
- More Examples
- Used in the Middle of Sentence
- I was on my way to the door, but all at once, through the fog in my head, I began to sight one reef that I hadn't paid any attention to afore.
- Finally, coral reef POM constitutes a source of OM for planktonic invertebrates and planktonophagous fish.
- Species living in the Mediterranean, Atlantic, and Northern Sea had similar encephalisation indices compared to the indopacific coral reef dwelling species.
- Used in the Middle of Sentence
Definition of reef in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Nouns
- Countable nouns
- Countable nouns
- Verbs
- Adjectives
Source: Wiktionary
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Grammatically, this word "reef" is an adjective. It's also a noun, more specifically, a countable noun. It's also a verb.