From Longman Dictionary of Contemporary Englishestimationes‧ti‧ma‧tion /ˌestəˈmeɪʃən/●くろまる○しろまる○しろまるAWL noun1[singular]THINK/HAVE THE OPINION THAT a judgment or opinion about someone or somethingin somebody’s estimationIn your estimation, who’s going to win?go up/come down in somebody’s estimation (=be respected or admired more or less by someone)2[countable] a calculation of the value, size, amount etc of somethingEstimations of total world sales are around the 50 million mark.Examples from the Corpusestimation• Emphasis should be given to practicalactivitiesinvolvingmeasurement and estimation.• I had not shone at school but I believed that I could do better than their lowlyestimation of my capability.• He is a totalgenius, in my estimation.• They must be ascribed the statusdue to calculations which contain a large element of estimation.• Still, if it helped to restore his own estimation of himself, let him think otherwise.• To aid the estimation of moving costs, we will assume that each room is of average size.• The same explanatoryvariable set was used in the estimation.From Longman Business Dictionaryestimationes‧ti‧ma‧tion /ˌestəˈmeɪʃən/ noun [countable]1your opinion of the value, nature etc of someone or somethingHis skills and abilities make him, in my estimation, an ideal candidate for the board of governors.2a calculation of what the value, size, amount etc of something will probably beSYNESTIMATEThe agriculture department’s report contains estimations of higher pork production to come.