Ill \Ill\, a. [The regular comparative and superlative are wanting, their places being supplied by worseand worst, from another root.]

[OE. ill, ille, Icel. illr; akin to Sw. illa, adv., Dan. ilde, adv.]

1. Contrary to good, in a physical sense; contrary or opposed to advantage, happiness, etc.; bad; evil; unfortunate; disagreeable; unfavorable.

Neither is it ill air only that maketh an ill seat, but ill ways, ill markets, and ill neighbors. --Bacon.

There 's some ill planet reigns. --Shak.

2. Contrary to good, in a moral sense; evil; wicked; wrong; iniquitious; naughtly; bad; improper.

Of his own body he was ill, and gave The clergy ill example. --Shak.

3. Sick; indisposed; unwell; diseased; disordered; as, ill of a fever.

I am in health, I breathe, and see thee ill. --Shak.

4. Not according with rule, fitness, or propriety; incorrect; rude; unpolished; inelegant.

That 's an ill phrase. --Shak.

Ill at ease, uneasy; uncomfortable; anxious. ``I am very ill at ease.'' --Shak.

Ill blood, enmity; resentment.

Ill breeding, want of good breeding; rudeness.

Ill fame, ill or bad repute; as, a house of ill fame, a house where lewd persons meet for illicit intercourse.

Ill humor, a disagreeable mood; bad temper.

Ill nature, bad disposition or temperament; sullenness; esp., a disposition to cause unhappiness to others.

Ill temper, anger; moroseness; crossness.

Ill turn.
   (a) An unkind act.
   (b) A slight attack of illness. [Colloq. U.S.]

Ill will, unkindness; enmity; malevolence.

Syn: Bad; evil; wrong; wicked; sick; unwell.

Source: Webster's Revised Unabridged Dictionary (1913)