Ifyou'regoingbytheMerriam-WebsterDictionarydefinitionoftheword, thetwoyou'reprobablymostfamiliarwithare "a restraintupontheactivitiesorcommunicationsof a personorthetransportofgoodsdesignedtopreventthespreadofdiseaseorpests" and "a stateofenforcedisolation."
Thefirstandsecondare "a periodof 40 days" and "a termduringwhich a shiparrivinginportandsuspectedofcarryingcontagiousdiseaseisheldinisolationfromtheshore."
Under 'trentino,' tradeshipsarrivingfromplague-infestedareasweretobeisolatedfor a periodof 30 daystoseeifthecrewpresentedplaguesymptomsbeforelettingthemmixwiththegeneralpopulation.