Thir"teen` , n.
1. The number greater by one than twelve; the sum of ten and three; thirteen units or
objects.
2. A symbol representing thirteen
units, as 13 or xiii.
Thir"teen` (th&etilde;r"tēn`),
a. [OE. threttene, AS. þreótēne, þreótyne. See Three, and Ten, and cf. Thirty.]
One more than twelve; ten and three; as, thirteen ounces or
pounds.