A region of the western Atlantic Ocean between the Azores and the Caribbean, so called because of the prevalence in it of floating sargasso seaweed. It is the breeding place of eels from the rivers of Europe and eastern North America, and is known for its usually calm conditions.
Definition of Sargasso Sea in US English:
Sargasso Sea
proper nounsärˌɡasō ˈsēsɑrˌɡæsoʊ ˈsi
A region of the western Atlantic Ocean between the Azores and the Caribbean Sea, so called because of the prevalence in it of floating sargasso seaweed. It is the breeding place of eels from the rivers of Europe and eastern North America, and is known for its usually calm conditions.