I fasten my hair with a hairpin.
Please fasten the cloth with a safety pin.
bowling pin
Specifically a bowling pin; used in the context of bowling.
He knocked down all the pins with a strike.
pin; flagstick
In golf, the flagstick marking the hole on the green.
I aim for the pin on the green and hit the ball.
I stuck pins into the fabric to hold it temporarily.
I threw the ball and knocked down all the pins.
I putted aiming for the pin on the green.
She put pins in her hair to keep it in place.
safety pin