[ il ]
/ ɪl /
adjective, worse, worst;ill·er, ill·est for 7.
of unsound physical or mental health; unwell; sick: She felt ill, so her teacher sent her to the nurse.
objectionable; unsatisfactory; poor; faulty: ill manners.
hostile; unkindly: ill feeling.
evil; wicked; bad: of ill repute.
unfavorable; adverse: ill fortune.
of inferior worth or ability; unskillful; inexpert: an ill example of scholarship.
Slang. great; amazing: His mom is the illest cook.
an unfavorable opinion or statement: I can speak no ill of her.
harm or injury: His remarks did much ill.
trouble, distress, or misfortune: Many ills befell him.
evil: to know the difference between good and ill.
sickness or disease.
in an ill manner.
unsatisfactorily; poorly: It ill befits a man to betray old friends.
in a hostile or unfriendly manner.
with displeasure or offense.
with difficulty or inconvenience; scarcely: Buying a new car is an expense we can ill afford.
SYNONYMS FOR ill
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Idioms for ill
ill at ease, socially uncomfortable; nervous: They were ill at ease because they didn't speak the language.
Origin of ill
1150–1200; Middle English ill(e) (noun and adj.) <Old Norse illr (adj.) ill, bad
synonym study for ill
1. 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. See bad1.
grammar notes for ill
WORDS THAT MAY BE CONFUSED WITH illill , sick1 (see synonym study at the current entry)
Definition for ill (2 of 4)
[ ahyl ]
/ aɪl /
contraction of I will.
usage note for I'll
Definition for ill (3 of 4)
Origin of ill.
(def. 4) <Latin illustrissimus
Definition for ill (4 of 4)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for ill (1 of 3)
/ (ɪl) /
adjective worse or worst
(usually postpositive) not in good health; sick
characterized by or intending evil, harm, etc; hostileill deeds
causing or resulting in pain, harm, adversity, etcill effects
ascribing or imputing evil to something referred toill repute
promising an unfavourable outcome; unpropitiousan ill omen
harsh; lacking kindnessill will
not up to an acceptable standard; faultyill manners
ill at ease unable to relax; uncomfortable
evil or harmto wish a person ill
a mild disease
badlythe title ill befits him
with difficulty; hardlyhe can ill afford the money
not rightlyshe ill deserves such good fortune
Word Origin for ill
C11 (in the sense: evil): from Old Norse illr bad
British Dictionary definitions for ill (2 of 3)
/ (aɪl) /
I will or I shall
British Dictionary definitions for ill (3 of 3)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medical definitions for ill
[ ĭl ]
Not healthy; sick.
Not normal, as a condition; unsound.
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.
Idioms and Phrases with ill
In addition to the idioms beginning with ill
- ill at ease
- ill wind that blows no one any good, it's an
, also see under
- get sick
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.