rudder

noun

rud·​der ˈrə-dər 

1

: an underwater blade that is positioned at the stern of a boat or ship and controlled by its helm and that when turned causes the vessel's head to turn in the same direction

2

: a movable auxiliary airfoil on an airplane usually attached at the rear end that serves to control direction of flight in the horizontal plane see airplane illustration

3

: a guiding force or strategy

rudderless

ˈrə-dər-ləs 

adjective

Examples of rudder in a Sentence

Recent Examples on the Web

That duo eliminates the need for your typical drive shafts and rudders—meaning that drag is significantly reduced and efficiently is increased, according to the yard. —Nicole Hoey, Robb Report, 28 Feb. 2025

The Douglas World Cruisers had a wingspan of 50 ft; and a length from propeller to rudder of just under 40 ft. —Bruce Dorminey, Forbes, 19 Dec. 2024

This causes some drag and turbulence problems even with the best aerodynamic design and is one reason why the empennage with the rudder and stabilizers are raised well away from the fuselage. —David Szondy, New Atlas, 2 Feb. 2025

An investigation of the incident found issues with the rudder system and pilot training. —Emma Bowman, NPR, 31 Jan. 2025

Word History

Etymology

Middle English rother, from Old English rōther paddle; akin to Old English rōwan to row

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for rudder

• scudder
• shudder
• udder

Kids Definition

rudder

noun

rud·​der ˈrəd-ər 

: a flat movable piece (as of wood or metal) attached to the rear of a ship or aircraft for steering