situated above or at a higher level or part
The upper shelf was too high for the child to reach.
Our apartment is on the upper floor overlooking the river.
✦ From Old English ufera “higher, upper,” comparative of ufe “above.”
the part of a shoe or boot that covers the top and sides of the foot above the sole
The leather upper of my sneakers tore after months of hiking.
These boots have a waterproof upper that keeps my feet dry.
✦ Noun sense recorded from the 17th century, referring to the “upper part” of a shoe.
an illegal or prescription drug or other substance that makes you feel more awake and energetic
Some truck drivers take uppers to stay awake during long overnight journeys.
The doctor warned her that mixing uppers with alcohol could be dangerous.
✦ Slang sense emerged in the 1960s from the idea of a drug that “lifts” or “ups” your energy.
