step down (also step aside) phrasal verb (see also step)
to leave your job or official position, because you want to or because you think you should:
Morris should step aside until the investigation is completed.
step down as
Eve Johnson has stepped down as chairperson.
step down from
He was forced to step down from his post.

[TahlilGaran] Dictionary of Contemporary English ▲

step down
to stop doing a job or stop having a position.
She stepped down as captain of the team.

[TahlilGaran] English Idioms Dictionary ▲

step down
v.
1. To come down in one move from a higher position to a lower.
As soon as the train stopped, the conductor stepped down to help the passengers off.
2. To make go slower little by little.
The train was approaching the station, so the engineer stepped it down.
Compare: SLOW DOWN, STEP UP.
3. To leave a job as an official or some other important position.
When the judge became ill, he had to step down.

[TahlilGaran] English Idioms Dictionary ▲