1 to emphasize sth so that people give it special attention 强调，凸显（以引起特别注意）: The report highlighted the need for improved safety at football grounds. 这份报告强调必须改善足球场的安全措施。

2 to mark part of a text with a different colour, etc so that people give it more attention 将文章的部份以不同颜色等标出（以引起较大注意）

3 to make some parts of a person's hair a lighter colour 将部份头发染成浅色: Have you had your hair highlighted? 你是不是将部份头发染成了浅色？