'Researcher' definitions:

Definition of 'researcher'

From: WordNet
noun
A scientist who devotes himself to doing research [syn: research worker, researcher, investigator]

Definition of 'Researcher'

From: GCIDE
  • Researcher \Re*search"er\ (-[~e]r), n. One who conducts research. In the field of scientific research, also called an investigator or scientist. [1913 Webster]

Synonyms of 'researcher'

From: Moby Thesaurus