The noun research has 2 senses (first 2 from tagged texts)
1. (47) research -- (systematic investigation to establish facts)
2. (7) inquiry, enquiry, research -- (a search for knowledge; "their pottery deserves more research than it has received")
Overview of verb research
The verb research has 2 senses (first 2 from tagged texts)
1. (2) research, search, explore -- (inquire into; "the students had to research the history of the Second World War for their history project"; "He searched for information on his relatives on the web"; "Scientists are exploring the nature of consciousness")
2. (1) research -- (attempt to find out in a systematically and scientific manner; "The student researched the history of that word")