the cardinal number that is the product of ten and six
<noun.quantity> [ adj ]
being ten more than fifty
<adj.all>
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.
Sixty \Six"ty\, n.; pl. {Sixties}. 1. The sum of six times ten; sixty units or objects.
2. A symbol representing sixty units, as 60, lx., or LX.
"The guy's back in 10 minutes with a trash-can bag filled with sixty grand, cash.