a. [ L. centenarius, fr. centum a hundred. ] 1. Relating to, or consisting of, a hundred. [ 1913 Webster ]
2. Occurring once in every hundred years; centennial. “Centenary solemnities.” Fuller. [ 1913 Webster ]
n.; pl. Centenaries 1. The aggregate of a hundred single things; specifically, a century. “Every centenary of years.” Hakewill. [ 1913 Webster ]
2. A commemoration or celebration of an event which occurred a hundred years before. [ 1913 Webster ]