Vane definitions

vān
A flat piece of metal, strip of cloth, etc. set up high to swing with the wind and show which way it is blowing; weather vane.
noun
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Any of several flat or curved pieces set around an axle and rotated about it by moving air, water, etc. [the vanes of a windmill], or mechanically rotated to move the air or water [the vanes of a turbine] or to compress the air [the vanes of a supercharger]
noun
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1
A projecting fixed or movable plate or strip of metal attached to a rocket, missile, etc. to provide stability or guidance.
noun
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0
A target set to slide on a leveling rod, for use in surveying.
noun
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Any of the sights on a compass, quadrant, etc.
noun
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1
1613-62; Eng. Puritan statesman: colonial governor of Mass. (1636-37)
proper name
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A weathervane.
noun
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Any of several usually relatively thin, rigid, flat, or sometimes curved surfaces radially mounted along an axis, as a blade in a turbine or a sail on a windmill, that is moved by or used to move a fluid.
noun
38
1
The flattened, weblike part of a feather, consisting of a series of barbs on either side of the shaft.
noun
35
1
One of the metal guidance or stabilizing fins attached to the tail of a bomb or other missile.
noun
32
1
The definition of a vane is a thin flat piece of metal or other material that moves with the wind or turns on an axis.

An example of a vane is the long flat surfaces that turn on a windmill.

An example of a vane is a piece of metal posted up in the air to see which waya the wind is blowing, a weather vane.

noun
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The flattened, weblike part of a feather, consisting of a series of barbs on either side of the shaft.
noun
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The flattened, weblike part of a feather, consisting of a series of barbs on either side of the rachis.
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(countable) A weather vane.
noun
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Any of several usually relatively thin, rigid, flat, or sometimes curved surfaces radially mounted along an axis, as a blade in a turbine or a sail on a windmill, that is turned by or used to turn a fluid.
noun
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The movable target on a leveling rod.
noun
0
0
A sight on a quadrant or compass.
noun
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The flat part of a feather with barbs; web.
noun
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A feather on an arrow, used to stabilize flight.
noun
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(ornithology) The flattened, web-like part of a feather, consisting of a series of barbs on either side of the shaft.
noun
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A sight on a sextant or compass.
noun
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0
One of the metal guidance or stabilizing fins attached to the tail of a bomb or other missile.
noun
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0

Origin of vane

Middle English fane, vane from Old English fana flag pan- in Indo-European roots