Pro tempore (abbreviated pro tem or p.t.) is a Latin phrase which means "for the time being" in English.[1] This phrase is often used to describe a person who temporarily acts in place of an elected or appointed official. Should the official, a mayor for example, be absent or unavailable for any reason, the pro tempore becomes the acting official (acting mayor in this case).[2] The president pro tempore of the United States Senate has been elected by the Senate since it began 1789.[1] In academic use a professor pro tempore is usually a temporary position.[3] In legal use a judge pro tempore is often an attorney who has been temporarily appointed by a judge.[4] It is also found as a phrase in many kinds of documents to simply mean "for the time being."