ill

If you're ill, you're unwell, or sick. Being ill is a good excuse for missing work or school.

You might get ill after being sneezed on by someone with a cold; or eating street food in a foreign country; or for no reason that you can point to. People can be mentally ill as well as physically ill, from depression or anxiety among other ailments. Ill can also mean "bad" in various ways, including when you suffer ill effects from going too long without sleep, or exercise ill judgment when you buy $500 worth of lottery tickets.

Definitions of ill
  1. adjective
    affected by an impairment of normal physical or mental function
    ill from the monotony of his suffering”
    synonyms: sick
    unfit
    not in good physical or mental condition; out of condition
    unhealthy
    not in or exhibiting good health in body or mind
    afflicted, stricken
    grievously affected especially by disease
    aguish
    affected by ague
    ailing, indisposed, peaked, poorly, seedy, sickly, under the weather, unwell
    somewhat ill or prone to illness
    air sick, airsick, carsick, seasick
    experiencing motion sickness
    autistic
    characteristic of or affected with autism
    bedfast, bedrid, bedridden, sick-abed
    confined to bed (by illness)
    bilious, liverish, livery
    suffering from or suggesting a liver disorder or gastric distress
    bronchitic
    suffering from or prone to bronchitis
    consumptive
    afflicted with or associated with pulmonary tuberculosis
    convalescent, recovering
    returning to health after illness or debility
    delirious, hallucinating
    experiencing delirium
    diabetic
    suffering from diabetes
    dizzy, giddy, vertiginous, woozy
    having or causing a whirling sensation; liable to falling
    dyspeptic
    suffering from dyspepsia
    faint, light, light-headed, lightheaded, swooning
    weak and likely to lose consciousness
    feverish, feverous
    having or affected by a fever
    funny
    experiencing odd bodily sensations
    gouty
    suffering from gout
    green
    looking pale and unhealthy
    laid low, stricken
    put out of action (by illness)
    laid up
    ill and usually confined
    milk-sick
    affected with or related to milk sickness
    nauseated, nauseous, queasy, sick, sickish
    feeling nausea; feeling about to vomit
    palsied
    affected with palsy or uncontrollable tremor
    paralytic, paralyzed
    affected with paralysis
    paraplegic
    suffering complete paralysis of the lower half of the body usually resulting from damage to the spinal cord
    rachitic, rickety
    affected with, suffering from, or characteristic of rickets
    scrofulous
    afflicted with scrofula
    sneezy
    inclined to sneeze
    spastic
    suffering from spastic paralysis
    tubercular, tuberculous
    constituting or afflicted with or caused by tuberculosis or the tubercle bacillus
    unhealed
    not healed
    upset
    mildly physically distressed
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    Antonyms:
    well
    in good health especially after having suffered illness or injury
    fit
    physically and mentally sound or healthy
    healthy
    having or indicating good health in body or mind; free from infirmity or disease
    asymptomatic, symptomless
    having no symptoms of illness or disease
    cured, healed, recovered
    freed from illness or injury
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  2. adjective
    resulting in suffering or adversity
    ill effects”
    “it's an ill wind that blows no good”
    Synonyms:
    harmful
    causing or capable of causing harm
  3. adjective
    distressing
    ill manners”
    “of ill repute”
    Synonyms:
    bad
    having undesirable or negative qualities
  4. adjective
    presaging ill fortune
    ill omens”
    ill predictions”
    synonyms: inauspicious, ominous
    unpropitious
    not propitious
  5. adverb
    (`ill' is often used as a combining form) in a poor or improper 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”
    synonyms: badly, poorly
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    Antonyms:
    good, well
    (often used as a combining form) in a good or proper or satisfactory manner or to a high standard (`good' is a nonstandard dialectal variant for `well')
  6. adverb
    with difficulty or inconvenience; scarcely or hardly
    “we can ill afford to buy a new car just now”
  7. noun
    an often persistent bodily disorder or disease; a cause for complaining
    synonyms: ailment, complaint
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    types:
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    pip
    a minor nonspecific ailment
    kinetosis, motion sickness
    the state of being dizzy or nauseated because of the motions that occur while traveling in or on a moving vehicle
    air sickness, airsickness
    motion sickness experienced while traveling by air (especially during turbulence)
    car sickness
    motion sickness experienced while traveling in a car
    mal de mer, naupathia, seasickness
    motion sickness experienced while traveling on water
    type of:
    disorder, upset
    a physical condition in which there is a disturbance of normal functioning
  8. adjective
    indicating hostility or enmity
    “you certainly did me an ill turn”
    ill feelings”
    ill will”
    Synonyms:
    hostile
    characterized by enmity or ill will
  9. adverb
    unfavorably or with disapproval
    “tried not to speak ill of the dead”
    synonyms: badly
    see moresee less
    Antonyms:
    well
    favorably; with approval
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