plural researches
1 : careful study that is done to find and report new knowledge about something
[noncount]
cancer/AIDS/drug research
medical/scientific/scholarly research
She conducts research into/on the causes of Alzheimer's disease.
— often used before another noun
research data/findings
a research group/organization/scientist
a research assistant
[plural]
(formal + old-fashioned) We read about Sigmund Freud's researches into the human psyche.
2 [noncount] : the activity of getting information about a subject
He did a lot of research before buying his car.
— see also MARKET RESEARCH
— researcher noun, plural researchers [count]
Medical researchers say that the drug is useless.