"vanguard" in the noun sense

1. vanguard, van

the leading units moving at the head of an army

2. 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)

3. 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"

Source: WordNet® (An amazing lexical database of English)

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