Definitions

1. verb

to add notes or comments to something, especially a text or document

“The student annotated the novel for her English class.”

2. noun

a note or comment added to something, especially a text or document

“The annotation in the margin explained the author’s intention.”

3. verb

to label or identify something, especially in a database or computer system

“The software annotates images with relevant metadata.”

4. noun

a label or identifier attached to something, especially in a database or computer system

“The annotation helped the search engine retrieve the correct information.”