Definition of approximation :
1. A continual approach or coming nearer to a result; as, to solve an equation by approximation.
2. A value that is nearly but not exactly correct.
3. An approach to a correct estimate, calculation, or conception, or to a given quantity, quality, etc.
4. The act of approximating; a drawing, advancing or being near; approach; also, the result of approximating.
calculation (part of speech: noun)
estimation, statistics, calculus, gauge, thought, arithmetic, value, consideration, judgement, mathematics, tally, evaluation, account, supposition, presumption, count, rank, calculation, assessment, method, conclusion, schedule, appraisal, program, study, plot, enumeration, system, computation, quantification, score, inference, algorithm, guess, multiplication, sum, deduction, plan, reckoning, valuation, determination, triangulation, division, algebra, scheme, measurement, total
representation (part of speech: noun)
carving, effigy, duplication, likeness, cast, bust, illustration, statue, metaphor, imitation, model, silhouette, drawing, image, copy, facsimile, portrayal, impression, picture, depiction, pastiche, analogy, miniature, photograph, replica, snapshot, representation, cartoon, outline, rendering, figurine, idol
imprecision (part of speech: noun)
- Just a young brood, no more than suckling infants- if suckling was the word, or even some kind of wild approximation. - "The World That Couldn't Be", Clifford Donald Simak.
- Complete data for this method are often not available; but in the early years of a field, before production curves are established, this method may serve for a rough approximation. - "The Economic Aspect of Geology", C. K. Leith.
- It has been said, not truly, but with a possible approximation to truth, " That in 1802 every hereditary monarch was insane". - "The English Constitution", Walter Bagehot.