Uncertain and Undefined

Uncertain adjective - Likely to change frequently, suddenly, or unexpectedly.

Undefined is a synonym for uncertain in unclear topic. In some cases you can use "Undefined" instead an adjective "Uncertain".

Nearby Words: uncertainty, uncertainly

Undefined adjective - Not seen or understood clearly.

Uncertain is a synonym for undefined in unclear topic. Sometimes you can use "Uncertain" instead an adjective "Undefined".