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# Definition of: approximation

(ə·prok′sə·mā**′**shən) noun **1.** The act or process of approximating. **2.** Math. A result sufficiently exact for a specified purpose. *Synonyms*: approach, contiguity, likeness, nearness, neighborhood, propinquity, resemblance, similarity. *Approximation* expresses as near an approach to accuracy and certainty as the conditions in any given case make possible. *Resemblance* and *similarity* may be but superficial and apparent; *approximation* is real. *Approach* is a relative term, indicating that one has come nearer than before; *approximation* brings one really near. *Nearness, neighborhood*, and *propinquity* are commonly used of place; *approximation*, of mathematical calculations and abstract reasoning; we speak of *approach* to the shore, *nearness* to the town, *approximation* to the truth. *Antonyms*: difference, distance, error, remoteness, unlikeness, variation.

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