a person who gives a message to sb or who delivers messages, letters, etc. to people as a job 送信人；信使；邮递员◆We sent the documents by messenger. 我们通过邮递员发送了那些文件。◆a bike messenger 骑自行车的邮递员
() a computer program that allows two or more people to communicate over the Internet using short written messages （利用互联网进行信息交流的）即时通软件◆an instant messenger program/service 即时通程序／服务