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rudder

[ruhd-er] /ˈrʌd ər/
noun
1.
Nautical. a vertical blade at the stern of a vessel that can be turned horizontally to change the vessel's direction when in motion.
2.
Aeronautics. a movable control surface attached to a vertical stabilizer, located at the rear of an airplane and used, along with the ailerons, to turn the airplane.
3.
any means of or device for governing, directing, or guiding a course, as a leader or principle:
His ideas provided a rudder for the new company.
Origin of rudder
900
before 900; Middle English rodder, rother, ruder, Old English rōther; cognate with Old Frisian rōther, Middle Dutch rōder (Dutch roer), Old High German ruodar (German Ruder); akin to row2
Related forms
ruddered, adjective
rudderless, adjective
rudderlike, adjective
unruddered, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for rudder
Contemporary Examples
Historical Examples
  • Some changes had been made in the planes and rudder, and the good effect was at once noticeable.

  • Gliders as a rule have only one rudder, and this is in the rear.

    Flying Machines W.J. Jackman and Thos. H. Russell
  • You will note that the rudder slides into the rear end of the projectile so that none of it extends out.

    Pharaoh's Broker Ellsworth Douglass
  • I used the paddle as a rudder, and to push floating timber away.

  • And, girls, what do you suppose that grouchy old fisherman will say when he sees we lost his rudder?

British Dictionary definitions for rudder

rudder

/ˈrʌdə/
noun
1.
(nautical) a pivoted vertical vane that projects into the water at the stern of a vessel and can be controlled by a tiller, wheel, or other apparatus to steer the vessel
2.
a vertical control surface attached to the rear of the fin used to steer an aircraft, in conjunction with the ailerons
3.
anything that guides or directs
Derived Forms
rudderless, adjective
Word Origin
Old English rōther; related to Old French rōther, Old High German ruodar, Old Norse rōthr. See row²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for rudder
n.

Old English roðor "paddle, oar," from Proto-Germanic *rothru- (cf. Old Frisian roðer, Middle Low German roder, Middle Dutch roeder, Dutch roer, Old High German ruodar, German Ruder "oar"), from *ro- "steer" (see row (v.)) + suffix -þra, used to form neutral names of tools. Meaning "broad, flat piece of wood attached to the stern of a boat and used for steering" is from c.1300. Spelling with -d- for -th- first recorded mid-15c. (cf. feather, mother, gather).

Online Etymology Dictionary, © 2010 Douglas Harper
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8
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