Sixteen \Six"teen`\, a. [AS. sixt?ne, sixt?ne. See Six, and Ten, and cf. Sixty.] Six and ten; consisting of six and ten; fifteen and one more.
Source: Webster's Revised Unabridged Dictionary (1913)
Sixteen \Six"teen`\, n.1. The number greater by a unit than fifteen; the sum of ten and six; sixteen units or objects.
2. A symbol representing sixteen units, as 16, or xvi.