from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun One, especially a detective, who investigates.

from The Century Dictionary.

  • noun One who investigates or makes careful research.

from the GNU version of the Collaborative International Dictionary of English.

  • noun One who searches diligently into a subject.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun One who investigates.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun someone who investigates
  • noun a police officer who investigates crimes
  • noun a scientist who devotes himself to doing research


from Wiktionary, Creative Commons Attribution/Share-Alike License

Attested in the mid‐16th Century CE; from Latin investigator, from investigare.


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