Longman Dictionary of Contemporary English homepage

estimation

 noun
     
es‧ti‧ma‧tion
1 [singular] a judgment or opinion about someone or something
in somebody's estimation
In 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 something:
Estimations of total world sales are around the 50 million mark.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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