Definition of “left” - Learner’s Dictionary

left

adjective [ always before noun ], adverb us uk /left/
Turn left at the next roundabout.Hold the reins in your left hand.Three were problems with the left chamber of the heart.I write with my left hand.Her left leg was injured.

A2 on or towards the side of your body that is to the west when you are facing north:

Step forward on your left leg.
She had a diamond earring in her left ear.
Turn left at the end of the hallway.
→ Opposite right adjective

(Definition of “left adjective, adverb” from the Cambridge Learner's Dictionary © Cambridge University Press)