1 (of a musical instrument) having been adjusted so as to give the correct pitches: Is the violin in tune with the piano?
az: düzgün köklənmiş
ru: настроенный в тон
2 (of a person’s singing voice) at the same pitch as that of other voices or instruments: Someone in the choir isn’t (singing) in tune.
az: ahəngdar, uyğun olmaq
ru: в унисон