Investigation
WordNet
noun
(1) The work of inquiring into something thoroughly and systematically
(2) An inquiry into unfamiliar or questionable activities
"There was a congressional probe into the scandal"
WiktionaryText
Noun
- The act of investigating; the process of inquiring into or following up; research; study; inquiry, esp. patient or thorough inquiry or examination; as, the investigations of the philosopher and the mathematician; the investigations of the judge, the moralist.