Thirty /(?)/

Thir·ty

Thirty

a.
  1. Being three times ten; consisting of one more than twenty-nine; twenty and ten; as, the month of June consists of thirty days.

Thirty

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.