{ } a. [ L. decem ten + novem nine. ] Pertaining to the number nineteen; of nineteen years. [ R. ] Holder. [ 1913 Webster ]
a. [ See Decennary. ] Consisting of ten years; happening every ten years; as, a decennial period; decennial games. Hallam. [ 1913 Webster ]
n. A tenth year or tenth anniversary. [ 1913 Webster ]