1. 派任；外派
    If you get a posting to a different town or country, your employers send you to work there, usually for several years.

    e.g. He was rewarded with a posting to New York...
           作为奖励，他被派往纽约工作。
    e.g. Relevant work experience is required for overseas postings.
           派驻海外要求有相关的工作经验。

2. （军队的）派驻，派遣
    If a member of an armed force gets a posting to a particular place, they are sent to live and work there for a period.

    e.g. ...awaiting his posting to a field ambulance corps in early 1941.
           他1941年年初等待被派往野战救护队
    e.g. ...a prestigious military posting.
           享有威望的军事委派

3. （因特网上的）帖子
    A posting is a message that is placed on the Internet, for example on a bulletin board or website, for everyone to read.

    e.g. Postings on the Internet can be accessed from anywhere in the world.
           因特网上的帖子在世界任何一个地方都能读到。