v.1. To enumerate a quantity of something unit by unit: The clerk counted out 12 roses and wrapped them in paper. I counted $5.38 out and handed it to the cashier.
2. To exclude someone from a group or activity: You can count me out if you plan to go swimming in this weather.
3. To eliminate something or someone as a possibility; disregard something or someone: I wouldn't count them out after that comeback last year. Don't count out the older competitors—they're the ones with experience.
4. To declare some boxer to have been knocked out by counting out loud the number of seconds by which the boxer must resume fighting: The boxer fell to the mat, and the ref counted him out to end the fight.