(medicine) Altitude sickness.

A paid personal day intended to be used due to illness either for recuperation or medical treatment.

(archaic) Epilepsy.

Paid absence from work specifically to recover from illness.

Alternative spelling of homesickness

motion sickness caused by travel in a vehicle

Money paid to an employee during his or her sick leave.

plural of sick puppy

(informal, idiomatic) A person who is sick (mentally disturbed) in a morbid or gruesome way.

An acute inflammation of the brain which causes drowsiness and mental disease.