1 : having or showing a clear understanding : perceptive clearheaded comments. 2 : able to think clearly stay calm and clearheaded.

What is the opposite of clearheaded?

Antonyms: befuddled, confused, dazzled, woolly, addled, stunned, spaced-out, puddingheaded, stupid(p), punch-drunk, wooly-minded, addlebrained, silly, addlepated, muddleheaded, stupefied, befogged, slaphappy, woolly-headed, clouded, trancelike, muzzy, muddled, dazed, wooly.

Is clear headedness a word?

adj. Having a clear, orderly mind; sensible. clear′head′ed·ly adv.