Definition:
five is a cardinal number that represents the quantity of five individual items. It can be used in a general sense to count objects or e.g. refer to a decade (the fifties).
Examples:
1. There are five pieces of pie on the counter.
2. She is one of five members of the student council.
3. On their fifth anniversary, they went on a vacation with five close friends.
Tips:
the common mistake with five is mixing up the pronunciation of the number (e.g. fife vs. five).