'Thirteenth' definitions:

Definition of 'thirteenth'

(from WordNet)
adjective
Coming next after the twelfth in position [syn: thirteenth, 13th]
noun
Position 13 in a countable series of things

Definition of 'Thirteenth'

From: GCIDE
  • Thirteenth \Thir"teenth`\ (th[~e]r"t[=e]nth`), a. [From Thirteen: cf. AS. [thorn]re['o]te['o][eth]a.]
  • 1. Next in order after the twelfth; the third after the tenth; -- the ordinal of thirteen; as, the thirteenth day of the month. [1913 Webster]
  • 2. Constituting or being one of thirteen equal parts into which anything is divided. [1913 Webster]

Definition of 'Thirteenth'

From: GCIDE
  • Thirteenth \Thir"teenth`\, n.
  • 1. The quotient of a unit divided by thirteen; one of thirteen equal parts into which anything is divided. [1913 Webster]
  • 2. The next in order after the twelfth. [1913 Webster]
  • 3. (Mus.) The interval comprising an octave and a sixth. [1913 Webster]