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