2 definitions found From WordNet (r) 2.0 [wn]: semibreve noun: a musical note having the longest time value (equal to four beats in common time) [syn: {whole note}] From The Collaborative International Dictionary of English v.0.44 [gcide]: Semibreve \Sem"i*breve'\, noun [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.

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