fin
1fin
noun \ˈfin\Definition of FIN
1
: an external membranous process of an aquatic animal (as a fish) used in propelling or guiding the body — see fish illustration
2
— fin·like \-ˌlīk\ adjective
— finned \ˈfind\ adjective
Origin of FIN
Middle English finn, from Old English
First Known Use: before 12th century
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