—n.
1 an approximate judgement, esp. of cost, value, size, etc.
2 a price specified as that likely to be charged for work to be undertaken.
—v.tr. (also absol.)
1 form an estimate or opinion of.
2 (foll. by that + clause) make a rough calculation.
3 (often foll. by at) form an estimate; adjudge.
4 fix (a price etc.) by estimate.
Derivatives:
estimative adj. estimator n.
Etymology: L aestimare aestimat- fix the price of
Useful english dictionary. 2012.