adj.
1.having or feeling no doubt or uncertainty
2.exercising or taking care great enough to bring assurance
3.certain to occur
4.physically secure or dependable
5.capable of being depended on
6.(of persons) worthy of trust or confidence
7.infallible or unfailing
8.certain not to fail
9.impossible to doubt or dispute sure adv.
1.definitely or positively (`sure' is sometimes used informally for `surely')
Idiom of the Day
right up (someone's) alley
to be ideally suited to someone's interests or abilities
Working with numbers is right up my alley.