Definition of "dependants" for tax purposes

[asadahmed]

I am moving out of Canada and planning to become non-resident Canadian for tax purposes. One of the main requirement for this is to cut all primary residential ties with Canada. As per CRA significant residential ties include: home in Canada, spouse and dependants.

My question is who is considered as a dependant from tax point of view. Any children under age of 22 is obvious but who else? For example, I sponsored my parents for permanent residency couple of years ago and this year they and my sister finally became permanent resident of Canada. Will they be considered as my dependants?