The act of treating a test, usually of skill or knowledge, as if it were timed and/or a race. This occurs most typically in an academic setting, but can be seen elsewhere, as in IQ or personality tests. The winner of a completition can be determined either by the fastest time, the best score or results, or most commonly a combination of the two.
Hortense: How'd you do on the Calc test, Biff? I pulled out a B+.
Biff: Eh, I got a B-, but I was the first one done by fifteen minutes. I totally won the completition.