Simple past tense and past participle of pin.(verb)
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Use "pinned" in a sentence
"Note the time of its application on a label pinned to the victim's clothes where it will be seen by later attendants, and leave the tourniquet exposed."
"Although I would credit Scottb with avoiding categorisation through his strident scientific objectivity, most of us cannot inhabit the halls of ON for long without having a label pinned on:"
"KING: So then, what is the middle ground if you believe the past has been heavy handed and you don't want to be soft, a label pinned against Jimmy Carter and other Democrats in the past, what is that ground in the middle where you can have a conversation but also have some red lines where we have a conversation, but if you don't step over this line eventually and give me something back, conversation ends."