- a horizontal, often adjustable, winglike appendage to the underwater portion of a hull, as one for controlling the dive of a submarine or for damping the roll of a surface vessel.
- fin keel.
verb (used with object), finned, fin·ning.
verb (used without object), finned, fin·ning.
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Origin of fin1
OTHER WORDS FROM finfinless, adjectivefinlike, adjective
Definition for fin (2 of 4)
Origin of fin2
Definition for fin (3 of 4)
Definition for fin (4 of 4)
Example sentences from the Web for fin
Studying fish fins could also lead to new designs for robots that swim and sense underwater and that can explore areas that would otherwise be difficult for people to reach.
The fins of round gobies can detect textures with a sensitivity similar to that of the pads on monkeys’ fingers, researchers report November 3 in the Journal of Experimental Biology.
The trail culminates with Marys Rock, a 3,514-foot mountain with large granite fins jutting out from the peak that offers long-range views of Shenandoah Valley.The Ultimate Shenandoah National Park Travel Guide|Graham Averill|October 7, 2020|Outside Online
Today, blue whales and other endangered species, like fin and humpbacks, are recovering, but slowly.Whale ‘roadkill’ is on the rise off California. A new detection system could help.|Erik Olsen|September 29, 2020|Popular Science
An internal shock cord allows it to fold in half like a tent pole and also supports a polymer fin that pivots around the monopod and slides up and down its upper half.Get More from Your Binoculars with This $100 Stick|Wes Siler|September 19, 2020|Outside Online
British Dictionary definitions for fin (1 of 5)
- British a vertical surface to which the rudder is attached, usually placed at the rear of an aeroplane to give stability about the vertical axisUS name: vertical stabilizer
- a tail surface fixed to a rocket or missile to give stability