ill

[il]
adjective, worse, worst.
1.
of unsound physical or mental health; unwell; sick: She felt ill, so her teacher sent her to the nurse.
2.
objectionable; unsatisfactory; poor; faulty: ill manners.
3.
hostile; unkindly: ill feeling.
4.
evil; wicked; bad: of ill repute.
5.
unfavorable; adverse: ill fortune.
6.
of inferior worth or ability; unskillful; inexpert: an ill example of scholarship.
noun
7.
an unfavorable opinion or statement: I can speak no ill of her.
8.
harm or injury: His remarks did much ill.
9.
trouble, distress, or misfortune: Many ills befell him.
10.
evil: to know the difference between good and ill.
11.
sickness or disease.
adverb
12.
in an ill manner.
13.
unsatisfactorily; poorly: It ill befits a man to betray old friends.
14.
in a hostile or unfriendly manner.
15.
unfavorably; unfortunately.
16.
with displeasure or offense.
17.
faultily; improperly.
18.
with difficulty or inconvenience; scarcely: Buying a new car is an expense we can ill afford.
Idioms
19.
ill at ease, socially uncomfortable; nervous: They were ill at ease because they didn't speak the language.

Origin:
1150–1200; Middle English ill(e) (noun and adj.) < Old Norse illr (adj.) ill, bad

ill, sick (see synonym study at the current entry).


1. unhealthy, ailing, diseased, afflicted. Ill, sick mean being in bad health, not being well. Ill is the more formal word. In the U.S. the two words are used practically interchangeably except that sick is always used when the word modifies the following noun: He looks sick (ill ); a sick person. In England, sick is not interchangeable with ill but usually has the connotation of nauseous: She got sick and threw up. sick however, is used before nouns just as in the U.S.: a sick man. 4. wrong, iniquitous. See bad1. 8. hurt, pain, affliction, misery. 9. calamity. 10. depravity. 11. illness, affliction. 13. badly.


1. well, healthy. 4. good.


See well1.
Dictionary.com Unabridged

I'll

[ahyl]
contraction of I will.
aisle, I'll, isle.


See contraction.

Ill.

ill.

4.
most illustrious.

Origin:
(def 4) < Latin illustrissimus

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
ill (ɪl)
 
adj , worse, worst
1.  (usually postpositive) not in good health; sick
2.  characterized by or intending evil, harm, etc; hostile: ill deeds
3.  causing or resulting in pain, harm, adversity, etc: ill effects
4.  ascribing or imputing evil to something referred to: ill repute
5.  promising an unfavourable outcome; unpropitious: an ill omen
6.  harsh; lacking kindness: ill will
7.  not up to an acceptable standard; faulty: ill manners
8.  ill at ease unable to relax; uncomfortable
 
n
9.  evil or harm: to wish a person ill
10.  a mild disease
11.  misfortune; trouble
 
adv
12.  badly: the title ill befits him
13.  with difficulty; hardly: he can ill afford the money
14.  not rightly: she ill deserves such good fortune
 
[C11 (in the sense: evil): from Old Norse illr bad]

Ill.
 
abbreviation for
Illinois

I'll (aɪl)
 
contraction of
I will or I shall

Collins English Dictionary - Complete & Unabridged 10th Edition
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Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

ill
c.1200, "morally evil" (other 13c. senses were "malevolent, hurtful, unfortunate, difficult"), from O.N. illr "ill, bad," of unknown origin. Not related to evil. Main modern sense of "sick, unhealthy, unwell" is first recorded c.1460, probably related to O.N. idiom "it is bad to me." Illness "disease,
sickness" is from 1689. Slang sense of "very good, cool" is 1980s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ill (ĭl)
adj. worse (wûrs), worst (wûrst)

  1. Not healthy; sick.

  2. Not normal, as a condition; unsound.

n.
A disease or illness, especially of animals.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Abbreviations & Acronyms
ill.
  1. illustrated

  2. illustration

Ill.
Illinois
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage
Idioms & Phrases

ill

In addition to the idioms beginning with ill, also see under get sick.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
Many will tell you that students are ill prepared for the demands of higher
  education.
The whale appeared to be ill from wounds that became infected as the rope dug
  into its skin.
Researchers uncover gene mutations that contribute to disease by screening the
  genomes of thousands of healthy and ill people.
He became ill and disabled and spent the last years of his life in an insane
  asylum.
Idioms & Phrases
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