off-key

Adjective

Synonyms: false sour

WordNet 3.0

inaccurate in pitch“a false (or sour) note”“her singing was off key”Synonyms: false sour

off-key \off-key\ adj. & adv. Deviating from the proper pitch; -- of a musical note or series of notes; as, an off-key note; to sing off-key.

Syn: false, sour. [WordNet 1.5]