undefined

A word in the urbandictionary that is lacking definition.

This word was previously undefined.

by Denis Baldwin June 3, 2004

undefined

The word that just popped up when you searched for a word that isn't in urban dictionary.

You: WTF!11!!ONE!!! UNDEFINED??!?!?!! WTF!

by PiracyX September 9, 2009

undefined

What you see when someone deletes your definition.

This word is undefined

by mesoiam February 6, 2005

undefined

undefined is just what it says

That is undefined to the MAX

undefined!

by stav August 10, 2004

undefined

undefined

undefined

by programmerista February 13, 2022

undefined

When you use Javascript and confused this between null and 0

undefined == null // true
undefined === null // false
// this is js

by katetem January 19, 2018

is undefined

the description of a word that has not been defined in the by urban dictionary viewers.

is undefined is undefined

by James T. Carson April 22, 2006