Source : Webster's Revised Unabridged Dictionary (1913)

Investigative \In*ves"ti*ga*tive\, a.
   Given to investigation; inquisitive; curious; searching.

Source : WordNet®

investigative
     adj : designed to find information or ascertain facts; "a
           fact-finding committee"; "investigative reporting"
           [syn: {fact-finding}, {investigatory}]