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 ]
[おんち, onchi](n, adj-no) (1) tone-deafness; amusia; having no ear for music; (adj-na) (2) tone-deaf; off-key; (suf) (3) having no sense (of something); being hopeless (when it comes to something); (P)[Add to Longdo]