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. [ 1913 Webster ]
a. [ From Thirteen: cf. AS. þreóteóða. ] 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 ]