grip (something, typically a person's flesh) tightly and sharply between finger and thumb

she pinched his cheek

move one's finger and thumb apart or bring them together on (a touchscreen) in order to zoom into or out of an image, activate a function, etc.

to explore in more detail just pinch the screen

you can pinch on the screen and all the open apps will appear

steal or take without permission

he pinched a handful of sweets

live in a frugal way

if I scraped and pinched a bit, I might manage

sail (a boat) so close to the wind that the sails begin to lose power

an act of pinching someone

he gave her a gentle pinch

a critical point in the game