adj. 1. Not formal or ceremonious; casual: an informal gathering of friends; a relaxed, informal manner. 2. Not being in accord with prescribed regulations or forms; unofficial: an informal agreement.

What is informal example?

The definition of informal is something or someone who is casual or relaxed. An example of informal used as an adjective is informal clothing, such as comfy casual jeans and a sweatshirt. ... Not requiring formal dress.

What does it mean when a word is informal?

not according to the prescribed, official, or customary way or manner; irregular; unofficial: informal proceedings. suitable to or characteristic of casual and familiar, but educated, speech or writing.