D defs.my
Entry 3 senses · 2 variants Webster, 1913

Thirty

/thŭr′tē/ · Thir·ty · IPA /ˈθɝti/
01 a. Being three times ten; consisting of one more than twenty-nine; twenty and ten; as, the month of June consists of thirty days.
  1. 1.
    Being three times ten; consisting of one more than twenty-nine; twenty and ten; as, the month of June consists of thirty days.
02 n. The sum of three tens, or twenty and ten; thirty units or objects.
pl. Thirties
  1. 1.
    The sum of three tens, or twenty and ten; thirty units or objects.
  2. 2.
    A symbol expressing thirty, as 30, or XXX.