undefined

adjective/ˌʌndɪˈfaɪnd/

Frequency rank: #12,594 of 20,003 in the WORDED list (wordfreq data)

Meaning

not given a clear meaning, value, or boundary; not defined.

Illustration for the English word “undefined”

Example sentence

The variable caused an error because its value was undefined.

Synonyms & related words

More words in ranks 12,501–12,600