Definition of investigator
plural investigators
: one who investigates something: such as
a
detective
- a private investigator
- Debra Winger plays the investigator who becomes fixated on identifying a killer …
- —Margaret Rauch
b
: a person who conducts experiments or is involved in scientific studies for research
- the lead investigator in a clinical trial
- For dialect recording, it is best for the investigator to take down as full and accurate notes as possible without slowing down the pace of the interview.
- —Ravin I. McDavid Jr.
