[di.ag.no.sis] n, pl -no.ses [NL, fr. Gk diagnosis, fr. diagignoskein to distinguish, fr. dia- + gignoskein to know--more at know] (ca. 1681) 1 a: the art or act of identifying a disease from its signs and symptoms b: the decision reached by diagnosis
2: a concise technical description of a taxon 3 a: investigation or analysis of the cause or nature of a condition, situation, or problem "~ of engine trouble" b: a statement or conclusion from such an analysis