Part of speech:
Having no limit or limits; unrestricted:
Having no bounds; unlimited; vast
Faintly or unclearly perceived; indistinct:
Not sharp, certain, or precise in thought, feeling, or expression
Find another word for undefined. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for undefined, like: limitless, boundless, forever, dim, unclear, indistinct, infinite, irregular, obscure, vague and defined.