Dictionary.net

• a major battle in the American Civil War (1863); the Confederates under Robert E. Lee defeated the Union forces under Joseph Hooker

2006 - WordNet 3.0
By Princeton University

• a major battle in the American Civil War (1863); the Confederates under Robert E. Lee defeated the Union forces under Joseph Hooker

2011 - English Dictionary Database
By DataStellar Co., Ltd