whole note

US /ˈhoʊl noʊt/
UK /ˈhoʊl noʊt/
"whole note" picture
1.

semibreve

a musical note with the longest time value in common use, equal to four beats in 4/4 time

:
The composer used a whole note to indicate a sustained sound.
Il compositore ha usato una semibreve per indicare un suono prolungato.
A whole note typically lasts for four beats in common time.
Una semibreve dura tipicamente quattro battiti in tempo comune.