'xx' definitions:

Definition of 'xx'

(from WordNet)
adjective
Denoting a quantity consisting of 20 items or units [syn: twenty, 20, xx]
noun
The cardinal number that is the sum of nineteen and one [syn: twenty, 20, XX]
noun
(genetics) normal complement of sex chromosomes in a female

Definition of 'xx'

From: GCIDE
  • xx \xx\, adj. The Roman number representing twenty; denoting a quantity consisting of 20 items or units.
  • Syn: twenty, 20, score. [WordNet 1.5]