Definition of an Accident


Accident includes

  • a willful and intentional act, not being the act of the worker

  • a chance event occasioned by a physical or natural cause, and

  • a disablement arising out of and in the course of employment.


Chance event

A chance event is defined as an identifiable unintended event which causes an injury. An injury itself is not a chance event.


The definition of disablement includes

  • a condition that emerges gradually over time

  • an unexpected result of working duties.

Application date

This policy applies to all decisions made on or after November 4, 1991, for all accidents.

Document History

This document replaces 03-01-01 dated November 4, 1991.


Legislative Authority

Workplace Safety and Insurance Act, 1997, as amended
Section 2(1)

Workers' Compensation Act, R.S.O. 1990, as amended
Section 1(1)


#20, June 25, 2004, Page 381