The definition of a rudder is a moveable flat and wide piece of wood or metal used for steering or directing.
(noun)An example of a rudder is what helps an aircraft direct its course from left to right.
See rudder in Webster's New World College Dictionary
noun
Origin: ME rother < OE; akin to Ger ruder: see row
Related Forms:
See rudder in American Heritage Dictionary 4
noun
Origin:
Origin: Middle English ruder
Origin: , from Old English rōther, steering oar; see erə- in Indo-European roots
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