(music) a tuning fork

tune

tuning a musical instrument

to use / to employ / to make use of, to apply / to spend

(music) a piano

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

street piano

(music) a grand piano