Noun vanguard has 3 senses
  1. vanguard, van - the leading units moving at the head of an army
    --1 is a kind of army unit
  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)
    --2 is a kind of artistic movement, art movement
  3. vanguard, forefront, cutting edge - the position of greatest advancement; the leading position in any movement or field
    --3 is a kind of position, view, perspective