thirty(n = noun.quantity) 30, xxx - the cardinal number that is the product of ten and three;
is a kind of large integer
thirty(s = adj.all) 30, xxx - being ten more than twenty;
Being three times ten; consisting of one more than twenty-nine; twenty and ten; as, the month of June consists of thirty days. [1913 Webster]
1. The sum of three tens, or twenty and ten; thirty units or objects. [1913 Webster]
2. A symbol expressing thirty, as 30, or XXX. [1913 Webster]
thirty, n. & adj.
--n. (pl. -ies)
1 the product of three and ten.
2 a symbol for this (30, xxx, XXX).
3 (in pl.) the numbers from
30 to 39, esp. the years of a century or of a person's life.
--adj. that amount to thirty.
Idiom:
thirty-first, -second , etc. the ordinal numbers between thirtieth and fortieth. Thirty-nine Articles the points of doctrine assented to by those taking orders in the Church of England. thirty-one, -two , etc. the cardinal numbers between thirty and forty. thirty-second note esp. US Mus. = DEMISEMIQUAVER. thirty-two-mo a book with 32 leaves to the printing-sheet.
Derivative:
thirtieth adj. & n. thirtyfold adj. & adv.
Etymology:
OE thritig (as THREE, -TY(2))