\ ə-ˈvast How to pronounce avast (audio) \

Definition of avast

a nautical command to stop or cease

First Known Use of avast

1681, in the meaning defined above

History and Etymology for avast

perhaps from Dutch houd vast hold fast

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The first known use of avast was in 1681

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Cite this Entry

“Avast.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/avast. Accessed 13 December 2019.

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What made you want to look up avast? Please tell us where you read or heard it (including the quote, if possible).


easily led, controlled, or managed

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