I. quar ‧ an ‧ tine 1 /ˈkwɒrəntiːn $ ˈkwɔː-/ BrE AmE noun [uncountable]
[ Date: 1600-1700 ; Language: Italian ; Origin: quarantina 'period of forty days' , from Old French , from quarante 'forty' , from Latin quadraginta ]
a period of time when a person or animal is kept apart from others in case they are carrying a disease
in quarantine
The monkeys were kept in quarantine for 31 days.
II. quarantine 2 BrE AmE verb [transitive]
to keep a person or animal apart from others for a period of time in case they are carrying a disease