Open English Wordnet
Adjectives
(s)advance, advanced, in advancesituated ahead or going before“an advance party”, “at that time the most advanced outpost was still east of the Rockies”
Adverbs
(r)ahead, in advance, beforehandahead 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”