Definition of starting block
1 : a device that usually consists of two blocks mounted on either side of an adjustable frame and that provides a runner with a rigid surface against which to brace the feet at the start of a race
2 : one of a series of boxes or low platforms at one end of a pool on which a competitor stands for the start of a swimming race
STARTING BLOCK Defined for English Language Learners
Definition of starting block for English Language Learners
: a device that has two blocks for runners to put their feet on and push against at the start of a race
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