Burn·side (bûrn'sīd') American general and politician known more for his side-whiskers (or sideburns) than for his career in the Union Army, which included defeats at Fredericksburg (1862) and Petersburg (1864).
style of facial hair consisting of side whiskers and a mustache (but clean-shaven chin), 1875, from U.S. Army Gen. Ambrose E. Burnside (1824-81) who wore them.