n. piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot
s. the topmost one of two
s. higher in place or position
s. superior in rank or accomplishment
词态变化
复数形式:uppers
常见例句
1
n the condition in which the upper teeth do not touch the lower teeth when biting
2
A morbid condition causing a peculiar brownish discoloration of the skin, and thought, at one time, to be due to disease of the suprarenal capsules (two flat triangular bodies covering the upper part of the kidneys), but now known not to be dependent upon this causes exclusively
3
any of a group of viruses including those that in humans cause upper respiratory infections or infectious pinkeye
4
especially the upper layers
5
personification of the sky or upper air breathed by the Olympians
