'Semibreve' definitions:

Definition of 'semibreve'

From: WordNet
noun
A musical note having the longest time value (equal to four beats in common time) [syn: whole note, semibreve]

Definition of 'Semibreve'

From: GCIDE
  • Semibreve \Sem"i*breve`\, n. [Pref. semi- + breve: cf. F. semi-breve, It. semibreve.] [Formerly written semibref.] (Mus.) A note of half the time or duration of the breve; -- now usually called a whole note. It is the longest note in general use. [1913 Webster]