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1. Affected by an impairment of normal physical or mental function
   "ill from the monotony of his suffering";
   - sick
    
2. Resulting in suffering or adversity
   "ill effects"; "it's an ill wind that blows no good"
    
3. Distressing
   "ill manners"; "of ill repute"
    
4. Indicating hostility or enmity
   "you certainly did me an ill turn"; "ill feelings"; "ill will"
    
5. Presaging ill fortune
   "ill omens"; "ill predictions";
   - inauspicious, ominous

1. In a poor or unsatisfactory manner; not well
   "he was ill prepared"; "it ill befits a man to betray old friends"; "ill-fitting clothes"; "an ill-conceived plan";
   - badly, poorly
    
2. Unfavourably or with disapproval
   "tried not to speak ill of the dead";
   - badly
    
3. With difficulty or inconvenience; scarcely or hardly
   "we can ill afford to buy a new car just now"

1. An often persistent bodily disorder or disease; a cause for complaining
   - ailment, complaint
    
2. That which causes harm, destruction or misfortune
   - evil
    
3. A source of difficulty
   - trouble, problem

1. I shall; I will

Derived forms: illest, ills, iller

See also: afflicted, aguish, ailing, air sick, airsick, autistic, bad, bedfast, bedrid [non-standard], bedridden, bilious, bronchitic, carsick, consumptive, convalescent, crook [Austral, NZ], delirious, diabetic, dizzy, dyspeptic, faint, feverish, feverous, funny, giddy, gouty, green, hallucinating, harmful, hostile, indisposed, laid low, laid up, light, lightheaded, light-headed, liverish, livery, milk-sick, nauseated, nauseous, off-colour [Brit], out of sorts, palsied, paralysed [Brit, Cdn], paralytic, paralyzed [N. Amer], paraplegic, peaked, poorly, queasy, rachitic, recovering, rickety, scrofulous, seasick, seedy, sick, sick-abed, sickish, sickly, sneezy, spastic, stricken, swooning, tubercular, tuberculous, under the weather, unfit, unhealed, unhealthy, unpropitious, unwell, upset, vertiginous, woozy

Type of: bad, badness, difficulty, disorder, upset

Antonym: well

Encyclopedia: Ill Ill, Austria Ill, France