trill

1 trill /ˈtrɪl/ noun
plural trills
1 trill
/ˈtrɪl/
noun
plural trills
Britannica Dictionary definition of TRILL
[count]
1 
: the sound of going quickly back and forth many times between two musical notes that are close to each other
2 
: a quick high sound that is repeated
2 trill /ˈtrɪl/ verb
trills; trilled; trilling
2 trill
/ˈtrɪl/
verb
trills; trilled; trilling
Britannica Dictionary definition of TRILL
1 
[+ object] : to say (something) with a trill
2 
[no object] : to make a series of quick high sounds