​a person who studies something carefully and tries to discover new facts about it. European researchers say olive oil could help prevent cancer.

The earliest known use of the noun researcher is in the early 1600s. OED's earliest evidence for researcher is from 1615, in the writing of Maxwell.

a careful study of a subject, especially in order to discover new facts or information about it. The plural form researches is also sometimes used in British ...

​to study something carefully and try to discover new facts about it. research (something) to research a topic/subject; She's in New York researching her ...

a careful study of a subject, especially in order to discover new facts or information about it medical/historical/scientific, etc.

someone who studies a subject, especially in order to discover new information or reach a new understanding.

There are five meanings listed in OED's entry for the verb research, two of which are labelled obsolete. See 'Meaning & use' for definitions, usage, and ...

any of several government organizations in Britain that support and carry out scientific research, and also provide scientific advice and information.

to study something carefully and try to discover new facts about it. research (into/in/on something) They're researching into ways of improving people's diet.

Over 400 entries. This new dictionary offers succinct, clear, expert explanations of key terms from both method and methodology in social research.