digits
slang One's phone number. Did you really get that girl's digits?
double digits
A phrase used to indicate a number between 10 and 99, or that set of numbers as a whole. The sales growth for that product was in the double digits this quarter. My daughter turns 10 this weekend, and I still can't believe I almost have a kid in double digits.
double-digit
Referring to a number between 10 and 99. I can't believe that product experienced double-digit sales growth this quarter.