Well, it depends on exactly how you define accident. In general, it would mean an unintended consequence, but arguably, driving whilst drunk and hitting something may be unintended, but not surprising - I wouldn't classify that as an accident as it was preventable and a known consequence of driving under the influence. If a careful driver suddenly has a heart attack and loses control, then I would classify that as an accident.

Reporting recommendations:

https://www.forbes.com/sites/carltonreid/2021/05/17/its-cras...

https://road.cc/content/news/media-guidelines-launched-repor...

https://www.rc-rg.com/guidelines