Definitions

1. verb

to remove a pin from something, especially a notice or a picture from a board

“She un pinned the notice from the bulletin board.”

2. verb

to remove something that is holding or supporting something else

“The workers un pinned the beam and set it aside.”

3. verb

to remove a pin or other fastener from a garment

“She un pinned her blouse and put it in the washing machine.”

4. noun

the act of removing a pin or other fastener

“The unpinning of the notice was a deliberate act of vandalism.”

5. noun

the state of being unfastened or unpinned

“The unpinning of the package caused it to fall apart.”