means To move or cause to move around a point or axis, change direction, or become something different.

from From Old English 'tyrnan' and 'turnian,' meaning to rotate or revolve, drawn from Latin 'tornare' — to turn on a lathe — which itself comes from 'tornus,' a turner's tool, borrowed from Greek 'tornos,' a compass or instrument for drawing circles. So the word's deepest ancestor is a craftsman's tool tracing a perfect arc — every modern 'turn,' from a wheel to a phrase to a person changing their mind, still carries that ghost of something pivoting around a fixed center.