What is considered a senior citizen in Ontario Canada?

The term "senior citizen" is often used to refer to individuals who are retired, typically those aged 65 or older. In Canada, the definition of a senior can vary depending on the context, but generally, individuals aged 65 and over are considered seniors. This definition is used by various government agencies and institutions, including the Canada Revenue Agency (CRA), Statistics Canada, and the Ontario Ministry of Seniors and Accessibility. However, it's worth noting that some organizations or programs may define seniors using slightly different age ranges, so it's always best to refer to the specific criteria set by the organization in question.