'Mezzo' definitions:

Definition of 'mezzo'

From: WordNet
noun
A soprano with a voice between soprano and contralto [syn: mezzo-soprano, mezzo]
noun
The female singing voice between contralto and soprano [syn: mezzo-soprano, mezzo]

Definition of 'Mezzo'

From: GCIDE
  • Mezzo \Mez"zo\, a. [It., from L. medius middle, half. See Mid, a.] (Mus.) Mean; not extreme. [1913 Webster]