Thir"ty (?), n.;
pl. Thirties (&?;). 1. The sum of three tens, or twenty and ten; thirty units or objects.
2. A symbol expressing thirty, as 30, or XXX.
Thir"ty (?), a. [OE.
thritty, AS. þrītig, þrittig; akin to D. dertig, G. dreissig, Icel. þrjātīu, þrjātigi,
þrir teger, Goth.
þreis tigjus, i.e., three tens.
See Three, and Ten, and
cf. Thirteen.]
Being three times ten; consisting of one more than
twenty-nine; twenty and ten; as, the month of June
consists of thirty
days.
Hear it pronounced