From Wiki

• Many applications for entry to Canada allow adult applicants to include their dependent children on their appliations.

• In most of these applications, the definition of a dependent child is as follows:

• A daughter or son who:
  • is under the age of 22 and does not have a spouse or common-law partner; or
  • is a full-time student and has been substantially dependent on a parent for financial support
    • since before the age of 22, or
    • since becoming a spouse or common-law partner (if this happened before age 22); or
  • has been financially dependent on a parent since before the age of 22 because of a disability.