n. 25B6; noun she hummed a cheerful tune : MELODY, air, strain, theme; song, jingle, ditty.
25B6; verb
they tuned their guitars : ADJUST, fine-tune.
a body clock tuned to the tides : ATTUNE, adapt, adjust, fine-tune; regulate, modulate.
25A0; change one's tune CHANGE ONE'S MIND, do a U-turn, have a change of heart; Brit. do an about-turn.
25A0; in tune IN ACCORD, in keeping, in accordance, in agreement, in harmony, in step, in line, in sympathy.