a·vant-garde (ä'vänt-gärd', āv'änt-) n. A group active in the invention and application of new techniques in a given field, especially in the arts. adj. Of, relating to, or being part of an innovative group, especially one in the arts: avant-garde painters; an avant-garde theater piece.
[French, from Old French, vanguard; see vanguard.] a'vant-gard'ism n., a'vant-gard'ist n.