- Reconnaissance is preliminary research or a preliminary survey such as checking out the lay-of-the-land before taking a military action.
An example of reconnaissance is when the military has a mission to go to an area and survey the enemy positions.
reconnaissance definition by Webster's New World
Origin: French earlier reconnoissance: see recognizance
reconnaissance definition by American Heritage Dictionary
Origin: French, from Old French reconoissance, recognition, from reconoistre, reconoiss-, to recognize; see recognize.