Definition of estimation noun from the Oxford Advanced Learner's Dictionary
estimation
noun
ˌestɪˈmeɪʃn ˌestɪˈmeɪʃn
(formal)
1[singular]a judgement or opinion about the value or quality of somebody/somethingWho 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[countable]a judgement about the levels or quantity of somethingEstimations of our total world sales are around 50 million.
ˌestɪˈmeɪʃn 
ˌestɪˈmeɪʃn 
