estimate

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To calculate approximately (the amount, extent, magnitude, position, or value of something).
2. v. To form an opinion about; evaluate: "While an author is yet living we estimate his powers by his worst performance” ( Samuel Johnson).
3. n. The act of evaluating or appraising.
4. n. A tentative evaluation or rough calculation, as of worth, quantity, or size.
5. n. A statement of the approximate cost of work to be done, such as a building project or car repairs.
6. n. A judgment based on one's impressions; an opinion.

Century Dictionary and Cyclopedia

1. To form a judgment or opinion regarding the value, size, weight, degree, extent, quantity, etc., of; compute, appraise, or value by judgment, opinion, or approximate calculation; fix the worth of; judge; reckon.
2. To esteem; honor.
3. Synonyms Value, Prize, Esteem, etc. (see appreciate); to count, judge, appraise.
4. n. A judgment or opinion as to the value, degree, extent, quantity, etc., of something; especially, a valuing determined by judgment, where exactness is not sought or is not attainable.
5. n. Estimation; reputation.

Wiktionary

1. n. A rough calculation or guess.
2. n. construction and business A document (or verbal notification) specifying how much a job will probably cost.
3. v. To calculate roughly, often from imperfect data.

GNU Webster's 1913

1. v. To judge and form an opinion of the value of, from imperfect data, -- either the extrinsic (money), or intrinsic (moral), value; to fix the worth of roughly or in a general way
2. v. To from an opinion of, as to amount,, number, etc., from imperfect data, comparison, or experience; to make an estimate of; to calculate roughly; to rate.
3. n. A valuing or rating by the mind, without actually measuring, weighing, or the like; rough or approximate calculation.

WordNet 3.0

1. n. a statement indicating the likely cost of some job
2. n. a judgment of the qualities of something or somebody
3. v. judge tentatively or form an estimate of (quantities or time)
4. n. a document appraising the value of something (as for insurance or taxation)
5. n. an approximate calculation of quantity or degree or worth
6. v. judge to be probable
7. n. the respect with which a person is held