v. de·cel·er·at·ed, de·cel·er·at·ing, de·cel·er·ates v.tr. 1. To decrease the velocity of. 2. To slow down the rate of advancement of: measures intended to decelerate the arms buildup. v.intr. To decrease in velocity. [DE- + (AC)CELERATE.] de·cel′er·ation n. de·celer·a′tor n. |
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