Highlighter (noun)

A pen-like instrument with a transparent fluorescent ink used to mark or highlight text, usually for the purpose of studying or note-taking.

Origin:

The word "highlighter" comes from the action of highlighting text.

Examples:

1. She used a highlighter to mark important parts of the text.
2. The highlighter was used to emphasize key points in the lecture.
3. Highlighters come in different colours, such as yellow, pink and green, to help users to categorize their notes.
4. The highlighter pen is a popular tool among students and professionals for note-taking and studying.
5. Many computer programs have a built-in highlighter feature, allowing users to highlight text on their screens.