Waning definitions

Waning is defined as fading or becoming less strong or powerful.

When the moon goes from a full moon to a crescent moon, this is an example of a time when it is waning.

When you were extremely interested in tennis and now you are only kind of interested in tennis, this is an example of a time when your interest in tennis is waning.

verb
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Becoming weaker or smaller.

His waning strength.

adjective
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Especially of the lunar phase as it shrinks when viewed from the Earth.

The waning moon.

adjective
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The fact or act of becoming less or less intense.

The waning of her energy.

noun
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The fact or act of becoming smaller.
noun
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Present participle of wane.
verb
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Origin of waning

From wane + -ing.