upper

/ˈʌpər/
noun
  1. The part of a shoe or boot that covers the top of the foot.
    • The leather upper of these boots is very durable.
    • The shoe's upper is made of mesh for breathability.
    • I need to clean the uppers of my sneakers.
  2. A stimulating drug, especially an amphetamine.
    • He was addicted to uppers and needed treatment.
    • Some athletes use uppers to boost their energy illegally.
    • The doctor warned him about the dangers of taking uppers.
adjective
  1. Located higher than something else; above.
    • She lives on the upper floor of the apartment building.
    • We hiked to the upper part of the mountain.
    • The upper shelf is too high for me to reach.
  2. Greater in rank, status, or importance.
    • Only upper management can approve that budget.
    • The upper echelons of the company made the final decision.
    • He comes from an upper social class.