Condense the supplied explanation into a glossary entry for the stated domain. Begin with the term, then identify what kind of thing it is and the feature that distinguishes it from related concepts. Use the meaning supported by the source rather than a broader dictionary meaning.

Keep a necessary scope restriction, contrast, unit, or exception. Include one short example only if the definition would otherwise be difficult to understand. Define an unfamiliar supporting term briefly or use an accurate familiar alternative. Avoid circular definitions that repeat the term without explaining it.

Remove history, repeated synonyms, sales language, and examples that do not change understanding. Do not add a formal threshold, guarantee, acronym expansion, or technical equivalence absent from the source. Preserve uncertainty where the source gives a provisional definition. Prefer one or two sentences. Return only the glossary entry, without an introduction.