cast off phr v 1 [I] to untie the rope that keeps a boat fastened to a post on the land, so that the boat can sail away 解开船缆 2 [T cast sb/sth ↔ off] literary to get rid of something or someone 【文】 摆脱; 把…丢在一边: a haven of tranquility where you can cast off the strains and stresses of life 能让你摆脱生活的紧张和压力的安静地方