Simple Definition of rudder

from our Learner's Dictionary

rudder

noun

ˈrʌdɚ How to pronounce rudder (audio)
plural rudders
: a flat, movable piece usually of wood or metal that is attached to a ship, boat, airplane, etc., and is used in steering

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“Rudder.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/rudder. Accessed 15 Apr. 2026.

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