undefined

adjective
UK /ˌʌndɪˈfaɪnd/
US /ˌʌndɪˈfaɪnd/

Something that is undefined has no clear meaning or value yet.

The answer stayed undefined until we found the missing number.


OTHER MEANINGS

2. In math, a value that cannot be given, like dividing by zero.

Dividing by zero gives an undefined result.

3. In computing, a variable that has no value stored in it.

The program crashed because the variable was undefined.

4. Not clearly marked or described.

The path ahead was undefined and hard to follow.