What does "in tune" mean?

Having the correct musical pitch.

What is a synonym for "in tune"?

Common synonyms include: accordant, according, agreeable, agreeing, akin, amicable.

prep_phrase

prep_phrase ·Rare ·Advanced level

Prep_phrase

1
Having the correct musical pitch.
"I need to fiddle with the strings on my violin. It doesn't sound in tune."
2
In an understanding relationship (with something or someone). figuratively, usually
"They are just not in tune with the contemporary market."

"I need to fiddle with the strings on my violin. It doesn't sound in tune."