n. [ See Senescent. ] The state of growing old; decay by time. [ 1913 Webster ]
a. [ L. senescent, p. pr. of senescere to grow old, incho. fr. senere to be old. ] Growing old; decaying with the lapse of time. “The night was senescent.” Poe. “With too senescent air.” Lowell. [ 1913 Webster ]