To cast off Meaning, Definition & Usage

Definitions
  1. . (a) To discard or reject; to drive away; to put off; to free one's self from. (b) (Hunting) To leave behind, as dogs; also, to set loose, or free, as dogs. Crabb. (c) (Naut.) To untie, throw off, or let go, as a rope.

Webster 1913