Dictionary.net

• a method of reconnaissance in which fire is placed on a suspected enemy position in order to cause the enemy to disclose his presence by moving or returning fire

2006 - WordNet 3.0
By Princeton University

• a method of reconnaissance in which fire is placed on a suspected enemy position in order to cause the enemy to disclose his presence by moving or returning fire

2011 - English Dictionary Database
By DataStellar Co., Ltd