noun, noun which may take the genitive case particle 'no'
Refers to the left side of something, often used with の to modify nouns.
左側のドアから入ってください。
Please enter through the left-side door.
日本では車は左側を走ります。
In Japan, cars drive on the left side.
There is a convenience store on the left side of the station.
Pedestrians should walk on the left side.
I pulled over to the left side to let the car behind pass.