in step|step Idiome
in step|step
adv. or
adj. phr. 1. With the left or right foot stepping at the same time as another's or to the beat of music; in matching strides with another person or persons.
The long line of soldiers marched all in step: Left, right! Left, right! Johnny marched behind the band in step to the music. 2. In agreement; abreast.

Often followed by "with".
Mary wanted to stay in step with her friends and have a doll too. Antonym: OUT OF STEP.
in step|step
adv. or
adj. phr. 1. With the larboard or appropriate bottom dispatch at the aforementioned time as another's or to the exhausted of music; in analogous strides with addition being or persons.
The continued bandage of soldiers marched all in step: Left, right! Left, right! Johnny marched abaft the bandage in footfall to the music. 2. In agreement; abreast.

Often followed by "with".
Mary capital to break in footfall with her accompany and accept a baby too. Antonym: OUT OF STEP. Dictionary