ˌoff-ˈkey BrE AmE adjective
music that is off-key sounds unpleasant because it is played slightly above or below the correct ↑ pitch ⇨ in tune :
The band sounded slightly off-key.
—off-key adverb :
Someone upstairs was singing off-key.
ˌoff-ˈkey BrE AmE adjective
music that is off-key sounds unpleasant because it is played slightly above or below the correct ↑ pitch ⇨ in tune :
The band sounded slightly off-key.
—off-key adverb :
Someone upstairs was singing off-key.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012