vi ‧ bra ‧ to /vɪˈbrɑːtəʊ $ -toʊ/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: Italian ; Origin: past participle of vibrare , from Latin ; ⇨ ↑ vibrate ]
a way of singing or playing a musical note so that it goes up and down very slightly in ↑ pitch