A swimming stroke where you lie on your side and move your arms and legs to stay afloat and move forward.
The sidestroke is a calm and easy way to swim.
Examples:
She swam using the sidestroke.
The lifeguard showed us how to do the sidestroke.
I like to swim with the sidestroke because it's easy.
The sidestroke is like a dance in the water.
I can swim really fast using the sidestroke.
The sidestroke is my favorite way to swim.