n. The act of estimating; the act of judging something with respect to value, degree, quantity, etc.n. Calculation; computation; especially, an approximate calculation of the worth, extent, quantity, etc., of something; an estimate: as, an estimation of distance, magnitude, or amount, of moral qualities, etc.n. In chem., the process of ascertaining by analysis the quantity of a given substance contained in a compound or mixture.n. Opinion or judgment in general; especially, favorable opinion held concerning one by others; esteem; regard; honor.n. Conjecture; supposition; surmise.n. Synonyms Appraisement, valuation.n. Estimate, Regard, etc. (see esteem); admiration, reverence, veneration.