noun

• Any number of places in the USA.
• A small city, the county seat of Oglethorpe County, Georgia.
• A city, the county seat of Fayette County, Kentucky, consolidated with the county.
• A town, the county seat of Middlesex County, Massachusetts.
• A city, the county seat of Holmes County, Mississippi.
• A city, the county seat of Lafayette County, Missouri.
• A city, the county seat of Dawson County, Nebraska.
• A city, the county seat of Davidson County, North Carolina.
• A town, the county seat of Lexington County, South Carolina.
• A city, the county seat of Henderson County, Tennessee.
• An independent city, the county seat of Rockbridge County, Virginia.
• The battle of Lexington, one of the first battles in the American Revolutionary War, see Wikipedia:Battles of Lexington and Concord.