An onomatopoeia for a sharp click or snap sound (e.g., a door clicking shut, a snap of fingers).
ドアがパチンと閉まり、部屋が静かになった。
The door clicked shut with a 'pachin', and the room became quiet.
彼は指をパチンと鳴らして注意を引いた。
He snapped his fingers with a 'pachin' to get attention.
袋の口がパチンと閉じられた音が聞こえた。
I heard the snap of the bag being closed.
A colloquial/abbreviated name for a small ornamental clip or clasp (hair clip, obi clip, etc.).
彼女は髪に小さなパチンをつけて出かけた。
She went out wearing a small decorative 'pachin' in her hair.
着物の帯にパチンを留めて簡単に固定した。
I simply fastened the obi with a little 'pachin' to keep it in place.