To stop or detain someone (or something) from leaving; to restrain or prevent someone from going away.
彼女は帰ろうとする私を必死に引き止めた。
She desperately tried to stop me from leaving.
上司が彼を会議に残るよう引き止めた。
The boss stopped him so he would stay for the meeting.
警察は容疑者を現場で引き止めた。
The police detained the suspect at the scene.