adjective, noun, modal particle, adverb · aesthetically pleasing, excellent, or of very high quality

这里的风景真美。

abbreviation · United States of America (abbreviation for 美国 Měi​guó)

美、英、法三国签署了新的贸易协定。

verb · to make something more attractive or to improve its appearance

这个滤镜可以美一下你的肤色。

adjective · to be smug, satisfied, or happy with oneself

听到老师的夸奖，他心里正美呢。