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Definition of annotator

annotator

/ˈæn.ə.teɪ.tɚ/
an · no · ta · tor
Plural:annotators
•
Adjective:annotative
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annotator Lexical Profile

annotator Game Scores & Validity

• noun

1

A person who adds explanatory notes, critical comments, or glosses to a text, document, or literary work.

Example

"The medieval manuscript contained dozens of margin notes left by an anonymous annotator."

2

A specialist or software tool that labels, tags, or categorizes raw data (such as text, audio, or images) to train machine learning models.

Example

"The research team hired three linguistic annotators to tag parts of speech across the training corpus."

Synonyms
View all synonyms for annotator

• Nearby Words

annona
annotate
annotation
annotator
announce
announcement
announcer

Word Origin & Etymology

Borrowed from Latin annotator, an agent noun derived from annotare ('to note down or add a comment to'), formed from ad- ('to') and notare ('to mark').

Cite this Entry

Wordmom. (2026). Definition of Annotator. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/annotator
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