engineer's disease noun2 •A bias of technical professionals who think that their expertise allows them to solve problems in unrelated fields.The idea of “engineer’s disease” developed while I (Graham) was talking with a crew of project managers. I was talking about Legionnaires’ disease, and they thought I said “engineer’s disease.” — 2019 •A tendency for engineers to be protective and perfectionist about their work.Revealing the workings of a machine, without disclosing what the machine does, is a classic symptom of engineer’s disease. — 1992