1. mod. agricultural. She spent a year at some aggie college, but didn’t like it.
2. n. a student of an agricultural (college) training program. (Specifically, Texas A&M) More and more aggies are going back for their MBAs.
3. n. an agricultural futures contract. (Securities markets. Usually plural.) The March aggies are looking good right now.
4. n. an agate marble or a glass imitation of one. I found the old aggies I played with when I was a kid.