Definition of "deceleration" [deceleration]

• The act or process of decelerating. (noun)
• The amount by which a speed or velocity decreases (and so a scalar quantity or a vector quantity). (noun)

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• "But when gas hits a muzzle brake, the deceleration is violent; it's like slamming the scope into a wall."
• "In physics the only difference between acceleration and deceleration is a minus sign."
• "Despite this near-term deceleration we saw further growth from our 40-nm products and are very pleased with the successful launch of our 28-nm FPGAs."