a letter sent to several people asking them to send a copy of the letter to several other people. The letter often contains a threat that something bad will happen if it is not sent to other people or a promise of money if it is. 连锁信(寄给数人的信,要求收信人复制数份再分寄给其他人,常对不寄信的人威胁厄运将降临或对寄信者许诺财运将至)