- plural of ethic.
ethics
Americannoun
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(used with a singular or plural verb) a system of moral principles.
the ethics of a culture.
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(used with a plural verb) the rules of conduct recognized in respect to a particular class of human actions or a particular group, culture, etc.: Christian ethics.
medical ethics;
Christian ethics.
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(used with a plural verb) moral principles, as of an individual.
His ethics forbade betrayal of a confidence.
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(used with a singular verb) that branch of philosophy dealing with values relating to human conduct, with respect to the rightness and wrongness of certain actions and to the goodness and badness of the motives and ends of such actions.
noun
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(functioning as singular) the philosophical study of the moral value of human conduct and of the rules and principles that ought to govern it; moral philosophy See also meta-ethics
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(functioning as plural) a social, religious, or civil code of behaviour considered correct, esp that of a particular group, profession, or individual
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(functioning as plural) the moral fitness of a decision, course of action, etc
he doubted the ethics of their verdict
Usage
What are ethics? Ethics are a system of moral principles or rules that say what is and is not acceptable. Generally speaking, ethics refer to the rules or code of conduct that people use to determine when an action is acceptable or not. Often, a person’s ethics are based on the rules of their society, such as laws or religious teachings. A society’s ethics might say that it is wrong to steal from someone else, for example. You may have your own ethics that are different from the society or community you live in. For example, you may move from a country where owning a gun is legal to one where it is not. In this case, your personal ethics (your belief that owning a gun is okay) may contradict the ethics of the country you now live in. In philosophy, the word ethics is used to mean the study of what makes a person decide what is right and wrong. Philosophers often use the word morality to mean the same thing. Outside of philosophy, though, we consider ethics and morals to be two different sets of values. Generally speaking, the difference between the two is that ethics are what a community considers to be right and wrong, and morals are what an individual considers to be good and bad or evil.
Synonym Usage
See moral.
Other Word Forms
Etymology
Origin of ethics
First recorded in 1400–50; late Middle English ethic + -s 3, modeled on Greek tà ēthiká, neuter plural
Explanation
When discussing a code of morals, choose the noun ethics. You might call a politician who uses taxpayer money for wild parties a little "ethics-challenged." Ethics can mean the study of morality — what's right and wrong. When discussing this branch of philosophy, treat the word as singular, despite the "-s": "Ethics is no longer widely taught." But in the sense of "moral correctness" or "a moral code," treat it as plural: "The ethics of capital punishment are complex." Don't confuse it with ethos, which means "the characteristic spirit of a culture." (Both words come from Greek ethos, "moral character.")
Vocabulary lists containing ethics
Journalism
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"Is Survival Selfish?" Vocabulary from the argument
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Herbert Hoover on "Rugged Individualism" (1928)
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Among the most influential voices leading the intellectual pushback to Project Spire now is Lord Nigel Biggar, an ordained Church of England priest and a former Christian ethics academic at Oxford University.
From BBC • Jun. 18, 2026
Fairness, ethics and legality occupy important places in finance, but when it comes to inheritance, the latter is the only one that matters.
From MarketWatch • Jun. 17, 2026
“Elections are not a game,” said Davina Hurt, director of government ethics at the Markkula Center for Applied Ethics at Santa Clara University.
From Los Angeles Times • Jun. 16, 2026
That case ground on for nearly a decade and ended with no admission of wrongdoing, though the settlement required the attorney general to pay $300,000 in restitution and undergo legal ethics training.
From The Wall Street Journal • Jun. 10, 2026
“Are you kidding? The hospital hates the ethics office, but they’d never admit it. You’ve never heard of the FSEB?”
From "The Adoration of Jenna Fox" by Mary E. Pearson
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.