vanguard, van -- (the leading units moving at the head of an army)
avant-garde, vanguard, van, new wave -- (any creative group active in the innovation and application of new concepts and techniques in a given field (especially in the arts))
vanguard, forefront, cutting edge -- (the position of greatest importance or advancement; the leading position in any movement or field; "the Cotswolds were once at the forefront of woollen manufacturing in England"; "the idea of motion was always to the forefront of his mind and central to his philosophy")
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