Alto

n.	1.	(Mus.) Formerly the part sung by the highest male, or counter-tenor, voices; now the part sung by the lowest female, or contralto, voices, between in tenor and soprano. In instrumental music it now signifies the tenor.
	2.	An alto singer. Alto clef (Mus.) the counter-tenor clef, or the C clef, placed so that the two strokes include the middle line of the staff. - Moore.

Noun	1.	alto - a singer whose voice lies in the alto clef
	2.	alto - the lowest female singing voice Synonyms: contralto
	3.	alto - the highest adult male singing voice Synonyms: countertenor
	4.	alto - the pitch range of the lowest female voice
Adj.	1.	alto - of or being the lowest female voice Synonyms: contralto
	2.	alto - of or being the highest male voice; having a range above that of tenor Synonyms: countertenor
	3.	alto - (of a musical instrument) second highest member of a group; "alto clarinet or recorder"

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