Synonym
A synonym is a word or expression with the same or a closely related meaning as another word or expression, particularly in a given context.
Elasticsearch in Action, Second Edition
A synonym is an alternative word or phrase treated as semantically equivalent to another word for search or text processing.
- How it is used
- Improves full-text search relevance by matching varied user vocabulary during text analysis.
- How deep it goes
- Defines synonyms and demonstrates token-filter configuration, _analyze testing, and filesystem loading without detailing token-stream internals.
- Examples
- Uses passion, cognizance, soccer, football, author, writer, and synonyms.txt to demonstrate missed matches, mappings, and normalization.
- What you can do after
- Apply it via an Elasticsearch synonym token filter, _analyze API, or synonyms_path file to test and maintain synonym mappings.
Read how Elasticsearch in Action, Second Edition explains synonym →
AI-Powered Search
A synonym is a replacement term sequence that represents the same or a very similar thing as another term sequence.
- How it is used
- Supports search engines through synonym lists that substitute equivalent or closely related term sequences.
- How deep it goes
- Defines synonyms, distinguishes alternative labels, and relates mappings to taxonomies; it stops short of implementation details.
- Examples
- Uses human, homo sapiens, mankind, software engineer, and software developer as synonym examples.
- What you can do after
- Evaluate/understand whether term sequences represent the same or a very similar thing in a search domain.
Related concepts
- normalizationused by · Normalization is the process of transforming a value, representation, or data structure to satisfy a specified standard, scale, or structural constraint.
- lemmatizationcontrasts with · Lemmatization is the linguistic normalization of inflected word forms to their canonical dictionary forms, called lemmas.
- text analyzerused by · A text analyzer is a component that transforms text into terms or other linguistic representations for indexing and searching.
- taxonomypart of · A taxonomy is a structured system for classifying entities or concepts into categories, which may be arranged hierarchically.
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