age: (noun) a period of human life, measured by years from birth, usually marked by a certain stage or degree of mental or physical development and involving legal responsibility and capacity.
I was at Second Cup today and while buying my latte picked up a voucher/flyer/thingy to do an online survey and win things.
When I had completed the survey, I had to select my age and immediately went for the "18-24" choice. I had to actually stop and think about how old I am. I'm 28. Sigh.