What does "semibreve" mean?

A musical note four beats long in 4/4 time; a whole note (US)

What is a synonym for "semibreve"?

Common synonyms include: accidental, crotchet, dominant, flat, minim, natural.

Pronounced //ˈsɛmɪbɹiːv//.

/ˈsɛmɪbɹiːv/ noun

noun ·Rare ·Advanced level

Noun

1
A musical note four beats long in 4/4 time; a whole note (US) Commonwealth, Ireland, UK
2
a musical note having the longest time value (equal to four beats in common time) wordnet

From Italian semibreve, ultimately from Latin semi- (“half”) and Latin brevis (“short”).