- research worker, researcher, investigator - a scientist who devotes himself to doing research
--1 is a kind of scientist, man of science
--1 has particulars: experimenter; boffin; fieldworker; postdoc, post docDerived form: verb investigate1 - investigator - someone who investigates
--2 is a kind of expert
--2 has particulars:adjuster, adjustor, claims adjuster, claims adjustor, claim agent; coroner, medical examiner; detective; examiner, inspector; ombudsman; Wiesenthal, Samuel Wiesenthal - detective, investigator, tec, police detective - a police officer who investigates crimes
--3 is a kind of policeman, police officer, officer
--3 has particulars: dick, gumshoe, hawkshaw; plainclothesman; tracerDerived form: verb investigate2 - detective, investigator, tec, police detective - a police officer who investigates crimes