3 definitions found

From WordNet (r) 2.0 [wn]:

thirty

adjective: being ten more than twenty [syn: {30}, {xxx}]

noun: the cardinal number that is the product of ten and three [syn: {30}, {XXX}]

From The Collaborative International Dictionary of English v.0.44 [gcide]:

Thirty \Thir"ty\, adjective [OE. thritty, AS. [thorn]r[=i]tig, [thorn]rittig; akin to D. dertig, G. dreissig, Icel. [thorn]rj[=a]t[=i]u, [thorn]rj[=a]tigi, [thorn]rir teger, Goth. [thorn]reis 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.

From The Collaborative International Dictionary of English v.0.44 [gcide]:

Thirty \Thir"ty\, noun; 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.
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