Definition of estimation noun from the Oxford Advanced Learner's Dictionary

      

    estimation

     noun
    noun
    BrE BrE//ˌestɪˈmeɪʃn//
     
    ; NAmE NAmE//ˌestɪˈmeɪʃn//
     
    (formal)
     
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  1. 1[singular] a judgement or opinion about the value or quality of somebody/something Who is the best candidate in your estimation? Since he left his wife he's certainly gone down in my estimation (= I have less respect for him). She went up in my estimation (= I have more respect for her) when I discovered how much charity work she does.
  2. 2[countable] a judgement about the levels or quantity of something Estimations of our total world sales are around 50 million.
  3. Word Origin late Middle English (originally in the sense ‘comprehension, intuition’, also ‘valuing, a valuation’): from Latin aestimatio(n-), from aestimare ‘determine, appraise’ (see estimate).Extra examples In my estimation, you’ve done a good job. She went up in my estimation when I discovered how much charity work she does. Since he left his wife, he’s certainly gone down in my estimation. Who is the best candidate in your estimation?
See the Oxford Advanced American Dictionary entry: estimation