Obscure and Undefined

Obscure adjective - Having an often intentionally veiled or uncertain meaning.

Undefined is a synonym for obscure in indistinct topic. In some cases you can use "Undefined" instead an adjective "Obscure", when it comes to topics like not easily understood.

Nearby Words: obscured, obscurity, obscurely, obscuring, obscuration

Undefined adjective - Not seen or understood clearly.

Obscure is a synonym for undefined in vague topic. You can use "Obscure" instead the word "Undefined" as an adjective or a verb, if it concerns topics such as indistinct.