(music) Having the correct musical pitch.
I need to fiddle with the strings on my violin. It doesn't sound in tune.
(figuratively, usually with "with") In an understanding relationship (with something or someone).
They are just not in tune with the contemporary market.
The gift of mental power comes from God, Divine Being, and if we concentrate our minds on that truth, we become in tune with this great power. My Mother had taught me to seek all truth in the Bible. Nikola Tesla
You must be in tune with the times and prepared to break with tradition. James Agee
All night have the roses heard The flute, violin, bassoon All night has the casement jessamine stirred To the dancers dancing in tune Till a silence fell with the waking bird, And a hush with the setting moon. Alfred, Lord Tennyson
A dripping june sets all in tune. German Proverb
When the furze is in bloom, my love's in tune. French Proverb
Calm weather in June, sets the corn in tune. American Proverb