English · Nature & Environment
reef
/riːf/
[/riːf/]
underwater rock ridge
Advancednoun
Definition
A line of rocks or coral near the surface of the sea.
Example
Divers explored the colourful coral reef, surrounded by tropical fish of every imaginable shade.
Divers explored the colourful coral reef, surrounded by tropical fish of every imaginable shade.
Etymology
From Old Norse 'rif', a ridge or sandbank.
How & Where It’s Used
Used in marine biology and diving.