adj. & n. 1 one more than twelve. 2 symbol for this (13, xiii, XIII). 3 size etc. denoted by thirteen. thirteenth adj. & n. [Old English: related to THREE]
adj. & n. 1 one more than twelve. 2 symbol for this (13, xiii, XIII). 3 size etc. denoted by thirteen. thirteenth adj. & n. [Old English: related to THREE]