Open English Wordnet
Nouns
(n)estimate, estimation, approximation, ideaan approximate calculation of quantity or degree or worth“an estimate of what it would cost”, “a rough idea how long it would take”
(n)estimate, estimationa judgment of the qualities of something or somebody“many factors are involved in any estimate of human life”, “in my estimation the boy is innocent”
(n)appraisal, estimate, estimationa document appraising the value of something (as for insurance or taxation)
(n)estimate, estimationthe respect with which a person is held“they had a high estimation of his ability”