Can I still be sponsored by my parent to go to Canada by the age of 21?

Hi, I'm 18 years old right now, and my parent will go to Canada soon. After 3 years, they will petition me to follow them to Canada. By that time, I will be 21 years old. Can they still petition me? I read from the Immigration website that my parent can still petition me as long as I'm still dependent. What's that supposed to mean? Am I still dependent by the age of 21?Can I still be sponsored by my parent to go to Canada by the age of 21?
All potential immigrants/job seekers, pls read,





Educated immigrants struggling to settle in Canada


OTTAWA -- A new report suggests immigrants to Canada are highly educated, but struggling to meet their potential.


The study by the Federation of Canadian Municipalities notes that recent working-age immigrants are twice as likely to have a university degree as other Canadians.





A group of commuters waits for a GO bus at Union Station in Toronto, Tuesday April 1, 2008. (THE CANADIAN PRESS / J.P. Moczulski)But these same immigrants are four times more likely to be unemployed, and far less likely to draw economic benefit from their post-secondary degree, than other Canadians.





University-trained immigrants aged 25 to 54 had an unemployment rate of about 12.1 per cent -- barely below the overall 12.8 per cent unemployment rate for all immigrants in that age category.





By comparison, the unemployment rate among university-trained non-immigrants was three per cent -- about half the unemployment rate of 5.6 per cent among non-immigrant Canadians in that age group