Definition

Not having a clear meaning or value; something that cannot be defined or explained.

Example

The result of dividing by zero is considered undefined in mathematics.

Conversation

Have you seen that math problem about dividing by zero?

Yeah, it's so confusing because the answer is undefined.

I know, right? It's strange how something can be undefined in math.

Exactly! It makes you think about how we define everything.

Synonyms & Antonyms

Root Explanation

Undefined → It is formed from "un-" (meaning not) and "defined" (from Latin "definire", meaning to limit or determine). The word "undefined" means not limited or determined, often used in contexts where a value or concept is not clearly specified.

Memory Tip

Think of 'not' ('un-') limiting or determining something ('defined') — that's why undefined means something that is not clearly defined.

Visually Confused Words