Ma'anar ƙamus na kalmar "tafiya ta leko" tafiya ne ko balaguro da aka yi don bincike, bincike, ko tattara bayanai game da wani wuri ko yanayi, musamman a shirye-shiryen wani aiki ko aukuwa na gaba. Musamman ma, ana yawan ɗaukar balaguron leƙen asiri don bincika wani yanki da nufin tantance dacewarsa ga wani aiki, kamar zango, yawon buɗe ido, farauta, ko gudanar da harkar kasuwanci. Ana amfani da kalmar a cikin mahallin ayyukan waje, amma kuma tana iya komawa ga kowane nau'in bincike ko aikin bincike.