The condition of being sick
A pathological condition of mind or body
The lingering sickness in his body fled, gone for good.
He had never seen nor heard of sorrow or sickness or poverty.
When you want a baby so bad, the first morning of sickness is a blessing.
I felt a sickness in my stomach at the news, in spite of having surmised as much.
Actually, her first morning of sickness had been unpleasant, until she discovered the cause was pregnancy.