“hold”的所有用法？请快点回答啊！！！！！

hold up SB 挡住某人的路

please hold on one second.请等下(电话)

he is a hold over.他是留级生.

Please hold the door.请扶住门.

Please hold on to the railing.请扶住栏杆.

Please hold me tight.请紧紧拥抱我.