əˈpɹeɪzəl əˌpɹɒksɪˈmeɪʃn əˌpɹɑksɪˈmeɪʃn ˈɛstɨmɨt ɛstɪˈmeɪʃən aɪˈdɪə aɪˈdi.ə ɑeˈdiə̯ a 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 an approximate calculation of quantity or degree or worth an estimate of what it would cost a rough idea how long it would take the respect with which a person is held they had a high estimation of his ability a document appraising the value of something (as for insurance or taxation)