Definitions
1.NounA cemetery shared by more than one church congregation or municipality, usually to lighten the financial burden (cost per congregation or municipality) and usually nondenominational/nonsectarian.
2.NounAn instance of such a cemetery, as for example Union Cemetery in Redwood City, California or Union Cemetery in Easton, Connecticut.
3.NounA cemetery principally for the interment of Union soldiers in the American Civil War.