simple past tense and past participle of turn
"He turned the key in the lock to open the front door."
In plain English: To turn means to move something so it faces a different direction or rotates around an axis.
"The car turned onto the main street."
moved around an axis or center
"The dancer spun gracefully, turning on her toes until she completed a full circle."
Turned is the past tense and past participle of turn, derived from Old English turnan, which meant to twist or rotate. It retains this original sense of changing position or direction in modern usage.