/ ˌestɪˈmeɪʃn; NAmE / noun ( formal )
[ sing. ] a judgement or opinion about the value or quality of sb/sth :
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.
[ C ] a judgement about the levels or quantity of sth :
Estimations of our total world sales are around 50 million.
late Middle English (originally in the sense comprehension, intuition , also valuing, a valuation ): from Latin aestimatio(n-) , from aestimare determine, appraise (see estimate ).