'Sixty' definitions:

Definition of 'sixty'

From: WordNet
adjective
Being ten more than fifty [syn: sixty, 60, lx, threescore]
noun
The cardinal number that is the product of ten and six [syn: sixty, 60, LX]

Definition of 'Sixty'

From: GCIDE
  • Sixty \Six"ty\, a. [AS. siextig; akin to G. sechzig, Goth. sa['i]hs tigjus. See Six, Ten, and cf. Sixteen.] Six times ten; fifty-nine and one more; threescore. [1913 Webster]

Definition of 'Sixty'

From: GCIDE
  • Sixty \Six"ty\, n.; pl. Sixties.
  • 1. The sum of six times ten; sixty units or objects. [1913 Webster]
  • 2. A symbol representing sixty units, as 60, lx., or LX. [1913 Webster]