straight pinOur editors are putting together more complete content — check back in about 20 minutesstraight pinstraight pin — noun名詞1. a thin piece of metal with a sharp point and a flat head, used for fastening pap1.名詞釋義a thin piece of metal with a sharp point and a flat head, used for fastening paper or cloth例句She used a straight pin to attach the note to the bulletin board.