estimation

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act or an instance of estimating.
• noun The amount, extent, position, size, or value reached in an estimate.
• noun An opinion or judgment.
• noun Favorable regard; esteem.

from The Century Dictionary.

• noun The act of estimating; the act of judging something with respect to value, degree, quantity, etc.
• noun 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.
• noun In chem., the process of ascertaining by analysis the quantity of a given substance contained in a compound or mixture.
• noun Opinion or judgment in general; especially, favorable opinion held concerning one by others; esteem; regard; honor.
• noun Conjecture; supposition; surmise.
• noun Synonyms Appraisement, valuation.
• noun Estimate, Regard, etc. (see esteem); admiration, reverence, veneration.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of estimating.
• noun An opinion or judgment of the worth, extent, or quantity of anything, formed without using precise data; valuation.
• noun Favorable opinion; esteem; regard; honor.
• noun Supposition; conjecture.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The process of making an estimate.
• noun The amount, extent, position, size, or value reached in an estimate.
• noun Esteem or favourable regard.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the respect with which a person is held
• noun an approximate calculation of quantity or degree or worth
• noun a judgment of the qualities of something or somebody
• noun a document appraising the value of something (as for insurance or taxation)