onset

• (military) an offensive against an enemy (using weapons)
• the beginning or early stages
• A rushing or setting upon
• A setting about
• Anything set on, or added, as an ornament or as a useful appendage
• To assault
• To set about
• Residential area (city, town, village) in the United States of America (USA) in Massachusetts

Report error with a word Suggest a new definition

You can also check definition for onset on wikipedia or google (link opens in new window)