cast off phrasal verbphr v a) TTWto untie the rope that fastens your boat to the shore so that you can sail away 解缆起航
b) GET RID OF cast somebody/something ↔ off literary to remove or get rid of something or someone that you no longer want or need 丢弃〔某物〕；抛弃〔某人〕 His family had cast him off without a penny. 他被家人赶了出来，身无分文。
c) DLHto finish a piece of knitting by removing the stitches from the needle to make an edge that will not come undone 〔编织〕收针cast something ↔ off Cast off four stitches. 收四针。
→ cast off at cast1(PHRASAL VERB)