noun
The table is held together by wooden pins. We need some more pins for the notice-board
She is wearing the cameo pin that her mother gave her. I had George's pin made into a brooch
verb
Let's play 'Pin the tail on the donkey'. Pin these papers together
They'll never be able to pin the murder on Drayton
pin down
We must pin him down to give his decision by tomorrow
The doctor was unable to pin down what is wrong with her
We were pinned down by enemy fire
US