Avast (disambiguation)
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Avast is a Czech technology and internet security company.
Avast may refer to:
- Avast Antivirus, an antivirus software provided by Avast
 - Avast, a nautical term meaning "stop" or "cease"
 - Avast! Recording Company, a music recording studio in Seattle, Washington
 - Avast!, a trademarked name for the herbicide fluridone