lustrous

In shampoo commercials, the hair you see swinging is lustrous. It is brilliant, in the shiny sense.

Lustrous has its root in the Latin lustrare which means "to illuminate or shine light over." When something is lustrous, it reflects light in a glossy and shiny way. A bright smile and a glowing reputation are both lustrous. If someone has a long and successful work history, you might say their career is illustrious, meaning it has been lustrous for a long time.

Definitions of lustrous
  1. adjective
    reflecting light
    lustrous auburn hair”
    synonyms: glistening, glossy, sheeny, shining, shiny
    bright
    emitting or reflecting light readily or in large amounts
  2. adjective
    made smooth and bright by or as if by rubbing; reflecting a sheen or glow
    “she brushed her hair until it fell in lustrous auburn waves”
    synonyms: bright, burnished, shining, shiny
    polished
    perfected or made shiny and smooth
  3. adjective
    brilliant
    “set a lustrous example for others to follow”
    lustrous actors of the time”
    Synonyms:
    glorious
    having or deserving or conferring glory
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