What is the Abbreviation for Extension?

How do you abbreviate extension? There are a few common ways to abbreviate extension.

They are,

  • Ext.
  • ETE
  • Extn.

For example,

  • Telephone Ext. 101
  • Master ETE 100
  • Extn. 2405

The most common of these abbreviations is Ext. In order to make any of these abbreviations plural, simply add an “s”.

For example,

  • Exts.

When to Use This Abbreviation

This abbreviation is usually found in business and office-wide applications, master phone lists, office memos, letterhead, etc. You might abbreviate the word extension to ext. on a business card or resume. It is also common to see such abbreviations in headlines or newspaper titles where space is a concern.

Outside of phone related lists or headlines, the word is not abbreviated in general prose.

What Does Extension Mean?

definition of extnDefinition of Extension: Extension is defined as a mutually agreed delay in the date set for the completion of a job or payment of a debt; a part that is added to something to enlarge or prolong it.

For example,

  • Martin applied for an extension of the loan.
  • He was able to get an extension of the due date for his thesis.
  • If you know your party’s extension, enter it now.

The word extension functions as a noun in the sentence.

Outside Examples of Extension

  • abbreviation of extension abbreviationBridich could have congratulated the work done in the dugout by already announcing an extension for the 52-year old Weiss, who walked into a clubhouse of 25 players and 99 problems in 2013, then was asked to restore order with the weak clout of the original one-year contract that Rockies ownership afforded him. –The Denver Post


There are two common abbreviations of extension: Ext., ETE, Extn. If you want to make any of these plural, simply add on an “s”.