up·per 
(ŭpər)
(ŭpər)adj.
1. Higher in place, position, or rank: the upper bunk; the upper half of the class.
2.
a. Situated on higher ground: upper regions.
b. Lying farther inland: the upper Nile.
c. Northern: the upper Midwest.
3. Upper Geology & Archaeology Of, relating to, or being a later division of the period named.
4. Denoting the smaller and usually less broadly representative house of a bicameral legislature.
n.
Idiom: 1. The part of a shoe or boot above the sole.
2. Informal An upper berth.
3. uppers Informal The upper teeth or a set of upper dentures.
4. Slang
a. A drug, especially an amphetamine, used as a stimulant.
b. An exhilarating or euphoric experience.
on (one's) uppers Informal
Impoverished; destitute.