[pree-kuh
n-dish-uhn] 
| 1. | something that must come before or is necessary to a subsequent result; condition: a precondition for a promotion. |
| 2. | to subject (a person or thing) to a special treatment in preparation for a subsequent experience, process, test, etc.: to precondition a surface to receive paint. |
| pre·con·di·tion (prē'kən-dĭsh'ən) n. A condition that must exist or be established before something can occur or be considered; a prerequisite. tr.v. pre·con·di·tioned, pre·con·di·tion·ing, pre·con·di·tions To condition, train, or accustom in advance. |