1 a description of the most important facts or ideas about sth 要点；概要；大纲；提纲: a brief outline of Indian history 印度史概要

2 a line that shows the shape or outside edge of sb/sth 外形；轮廓: She could see the outline of a person through the mist. 她在薄雾中可以看到一个人的轮廓。