/ twaɪs; NAmE / adverb
1.
two times; on two occasions :
I don't know him well; I've only met him twice.
They go there twice a week / month / year .
a twice-monthly / yearly newsletter
2.
double in quantity, rate, etc. :
an area twice the size of Wales
Cats sleep twice as much as people.
At 56 he's twice her age.
•
IDIOMS
- twice over
—more at lightning noun , once adverb , think verb
••
WORD ORIGIN
late Old English twiges , from the base of two + -s (later respelled -ce to denote the unvoiced sound); compare with once .