rudder

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

a broad, flat, movable piece of wood or metal hinged vertically at the stern of a boat or ship, used for steering
a movable piece attached to the vertical stabilizer of an aircraft, etc., used for controlling direction to the left or right
something serving to guide, direct, or control

Origin: ME rother < OE; akin to Ger ruder: see row

Related Forms:

See rudder in American Heritage Dictionary 4

noun

a. A vertically hinged plate of metal, fiberglass, or wood mounted at the stern of a ship or boat for directing its course.
b. A similar structure at the tail of an aircraft, used for effecting horizontal changes in course.
A controlling agent or influence over direction; a guide.

Origin:

Origin: Middle English ruder

Origin: , from Old English rōther, steering oar; see erə- in Indo-European roots

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