starting block

noun

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

Illustration of starting block

• starting block 1

Word History

First Known Use

1910, in the meaning defined at sense 1