measure word, idiom · metaphorically very small or short, derived from the width of a thumb or a single unit of length

我们要珍惜每一寸光阴。

measure word · a unit of length in the imperial system, equal to 2.54 centimeters, often used for screen sizes or photos

他买了一台五十五寸的液晶电视。

measure word, noun · a traditional Chinese unit of length, often called the Chinese inch, approximately 3.33 centimeters

这根绣花针约有两寸长。

noun · in TCM pulse-taking, the specific position distal to the radial styloid process

中医切脉讲究寸、关、尺三个部位。