obligation

American  

[ob-li-gey-shuhn] / ˌɒb lɪˈgeɪ ʃən /

noun

1. something by which a person is bound or obliged to do certain things, and which arises out of a sense of duty or results from custom, law, etc.

   Synonyms:

   responsibility

2. something that is done or is to be done for such reasons.

   to fulfill one's obligations.

3. a binding promise, contract, sense of duty, etc.

4. the act of binding or obliging oneself by a promise, contract, etc.

5. Law.

   1. an agreement enforceable by law, originally applied to promises under seal.

   2. a document containing such an agreement.

   3. a bond containing a penalty, with a condition annexed for payment of money, performance of covenants, etc.

   Synonyms:

   covenant, contract

6. any bond, note, bill, certificate, or the like, as of a government or a corporation, serving as evidence of indebtedness.

7. an indebtedness or amount of indebtedness.

8. a favor, service, or benefit for which gratitude is due.

9. a debt of gratitude.

   He felt an obligation to his teacher.

10. the state of being under a debt, as of gratitude, for a favor, service, or benefit.

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obligation British  

/ ˌɒblɪˈɡeɪʃən /

noun

1. a moral or legal requirement; duty

2. the act of obligating or the state of being obligated

3. law a legally enforceable agreement to perform some act, esp to pay money, for the benefit of another party

4. law

   1. a written contract containing a penalty

   2. an instrument acknowledging indebtedness to secure the repayment of money borrowed

5. a person or thing to which one is bound morally or legally

6. something owed in return for a service or favour

7. a service or favour for which one is indebted

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Related Words

See duty.

Other Word Forms

• obligational adjective
• preobligation noun
• reobligation noun
• superobligation noun

Etymology

Origin of obligation

First recorded in 1250–1300; Middle English obligacioun, from Old French obligation, from Latin obligātiōn-, stem of obligātiō “bond, engagement, pledge,” from obligāt(us) “bound” (past participle of obligāre; obligate ) + -iō -ion

Example Sentences

Environmental Protection Agency Administrator Lee Zeldin to give him a list of insurers that “acted swiftly, courageously, and bravely” to fulfill their legal obligation and another list of those that were “particularly bad.”

From Los Angeles Times • Apr. 3, 2026

Bondi egregiously mishandled the Epstein files, illegally withholding vast troves of materials that she had a legal obligation to release.

From Slate • Apr. 3, 2026

This means he believes he can literally do no wrong, and therefore, he has no obligation to consider anything before he makes a decision.

From Salon • Mar. 29, 2026

Producing an adaptation plan is an obligation under the UK's Climate Change Act 2008 - the world's first legally-binding national framework for greenhouse gas reductions.

From BBC • Mar. 19, 2026

And as a sweetener, he was released from any obligation to keep up payments on Michelangelo’s part of the two outstanding dowries, since he had already more than paid his own share.

From "The Scientists" by John Gribbin

Related Words

• accountability
• agreement
• bond
• burden
• commitment
• constraint
• contract
• debt
• duty
• liability
• necessity
• need
• promise
• requirement
• right
• trust
• understanding