measure word · a brief look or a glance, often used with the numeral 'one'

他回头看了我一眼。

noun, verb, adverb, pronoun, measure word · the organ of sight

他在眼角处有一颗小小的痣。

measure word · measure word for specific objects like wells or cave-dwellings

我家门前有一眼井。

noun, place word · a key point, crucial spot, or a strategic space in a board game

这句话说到了眼上。

noun · a small opening or puncture

他在墙上钻了一个眼儿。