peter out

phrasal verb·1 sense·particle out

Usefulness

Meanings

1

Become weaker and gradually stop

Why “out”? Something is used until nothing is left. Energy, supply, fire, and time all reach zero.

The conversation petered out.
The conversation slowly became quieter until it stopped.
The applause petered out.
The applause gradually became weaker until it stopped.

Test yourself

The conversation petered out. What does it mean?

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