noun, directional, verb · the top and bottom or full vertical extent of something; to move upwards and downwards

他上下打量着眼前的这栋建筑。

numeral · used after a quantity or age to indicate an approximate amount; or so

他看起来有五十岁上下。

noun · superiors and subordinates; all members of a social hierarchy or group

全厂上下都在为完成任务而努力。

directional · the difference in quality, skill, or rank; relative standing or degree

这两位拳击手的水平在上下之间，谁赢都不会让人意外。

directional · referring to the two separate volumes or parts of a multi-part publication

这本诗集分为上下两辑出版。

numeral · relative position in a sequence, text, or time; context

这位老师的年纪在四十岁上下。