From Longman Dictionary of Contemporary Englishsign off phrasal verb1 informalAMTGOODBYE to end a radio or television programme by saying goodbye2 SIGN YOUR NAMEto write your final message at the end of an informal letter It’s getting late, so I’ll sign off now. Love, John.3 sign somebody off British English if a doctor signs someone off, he or she gives them a note saying that they are ill and not able to work For the last month, she has been signed off sick from work.4 sign something ↔ off British English, sign off on something American English to show that you approve of a plan or that something is finished by signing an official document Major repainting work now needs to be signed off by a qualified engineer. → sign→ See Verb table
