D defs.my
Entry 1 sense Webster, 1913

Investigation

/ĭnˌ-vĕsˌ-təg-āsh'-ən/ · In·ves·ti·ga·tion · IPA /ɪnˌvɛs.tɪˈɡeɪ.ʃən/
01 n. The act of investigating; the process of inquiring into or following up; research; study; inquiry, esp. patient or thorough inquiry or exam…
  1. 1.
    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.