an·​no·​ta·​tion ˌa-nə-ˈtā-shən How to pronounce annotation (audio)
: a note added by way of comment or explanation
The bibliography was provided with helpful annotations.
: the act of annotating something

Example Sentences

Without the annotations, the diagram would be hard to understand. the author's annotation of the diagram
Recent Examples on the Web Beyond experience, professional annotation companies must have innovative tools to realize perfect pixel accuracy. Sasha Andrieiev, Forbes, 24 Jan. 2023 The suit claims — and a review of each song’s Genius annotation confirms — that the two compositions bear a strong resemblance. Gene Maddaus, Variety, 20 Jan. 2023 The inherent problem is to do so—for a large amount of motions—without introducing mistakes in the annotation. IEEE Spectrum, 20 Jan. 2023 In 2013, Ascension acquired 15 hospitals in low-poverty areas; an annotation on a third chart incorrectly said 13. WSJ, 28 Dec. 2022 Note that the annotation here is based off a copyedited, transcribed recording of the interview, and that this interview was conducted during summer 2022. Roger Huang, Forbes, 27 Dec. 2022 In fact, Delphi is left-leaning in this regard because many of the crowd workers who do annotation for us are a little bit left-leaning. David Marchese David Marchese, New York Times, 21 Dec. 2022 And for that reason, there is a motivation to automate the curation of larger datasets so that more costly human-in-the-loop annotation is applied only where there is a real return on investment. Phil Hall, Forbes, 19 Dec. 2022 For example, Bxf5#. Commentary marks, also known as annotation symbols, sometimes appear in analysis of games. Isaac Aronow, New York Times, 13 June 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'annotation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


see annotate

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of annotation was in the 15th century

Dictionary Entries Near annotation

Cite this Entry

“Annotation.” Dictionary, Merriam-Webster, Accessed 9 Feb. 2023.

Kids Definition


an·​no·​ta·​tion ˌan-ə-ˈtā-shən How to pronounce annotation (audio)
: the act of annotating
: a note added as a comment or explanation

Legal Definition


an·​no·​ta·​tion ˌa-nə-ˈtā-shən How to pronounce annotation (audio)
: a note added (as to a statute) by way of comment or explanation often furnishing summaries of relevant court decisions
capitalized : an informational and descriptive note or essay (as about a case or legal issue) especially in American Law Reports
Last Updated: - Updated example sentences
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