Definition of "Ill" :

noun: an often persistent bodily disorder or disease; a cause for complaining

adjective: presaging ill fortune

"Ill omens."

adjective: distressing

"Ill manners."

adjective: resulting in suffering or adversity

"Ill effects."

adjective: indicating hostility or enmity

"You certainly did me an ill turn."

adjective: affected by an impairment of normal physical or mental function

"Ill from the monotony of his suffering."

adverb: (ill' is often used as a combining form) in a poor or improper or unsatisfactory manner; not well

"He was ill prepared."

adverb: with difficulty or inconvenience; scarcely or hardly

"We can ill afford to buy a new car just now."

adverb: unfavorably or with disapproval

"Tried not to speak ill of the dead."