UNPIN Meaning of UNPIN in English transcription, транскрипция: [ ˈʌnˈpɪn ]v.tr. (unpinned, unpinning) 1 unfasten or detach by removing a pin or pins. 2 Chess release (a piece that has been pinned). English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012