Definition 1 of 3
Used as a traditional sequence before starting a race to ensure fairness.
Runners lined up, heard 'Ready, steady, go!' and bolted.
Reflects a series of commands to prepare, get set in position, and then start.
The sprinters crouched down at 'Ready, steady,' and sprinted at 'go!'.
Although it initiates action, 'Ready, steady, go!' is informal and less abrupt than a starting pistol.
At the charity race, 'Ready, steady, go!' replaced the louder pistol start.