1. advance(prenominal), advanced(prenominal), in advance(predicate), front(prenominal) (vs. back)
usage: situated ahead or going before; "an advance party"; "at that time the most advanced outpost was still east of the Rockies"
Adverb
1. ahead, in advance, beforehand
usage: ahead of time; in anticipation; "when you pay ahead (or in advance) you receive a discount"; "We like to plan ahead"; "should have made reservations beforehand"