n. The state of being sick or suffering from disease; a diseased condition of the system; illness; ill health.n. A disease; a malady; a particular kind of disorder.n. A derangement or disturbance of the stomach, manifesting itself in nausea, retching, and vomiting: distinctively called sickness of the stomach.n. A disordered, distracted, or enfeebled state of anything.n. Synonyms and Ailment, etc. See illness and sick.n. Disorder, distemper, complaint.