off-key
adjective
[ ɒfˈkiː ]
• (of music or singing) not having the correct tone or pitch; out of tune.
• "an off-key version of the hymn began"
Opposite:
in tune,
off-key
adverb
• with incorrect tone or pitch.
• "he ruined a dream duet by singing off-key"
out of key
• not with correct pitch; out of tune.
• "my guitar was out of key"
