deontic

IPA/diˈɒntɪk/
IPA/diˈɑːntɪk/

deontic — adjective

  • deonticpositive
  • more deonticcomparative
  • most deonticsuperlative

1. concerning duty, obligation, or permission — used mainly of language and formal

1.adjectiveC2
Definition

concerning duty, obligation, or permission — used mainly of language and formal logic that expresses what people ought or are allowed to do

Example

Arjun explained how deontic verbs like 'must' express obligation in his syntax class.

deontic + noun: deontic verbs

Zuri's dissertation examined deontic modality in three West African languages.

collocation: deontic modality

Synonyms
  • deontological

    more common in moral philosophy; often interchangeable but belongs primarily to ethics rather than linguistics

  • prescriptive

    broader and less technical; describes anything that tells people what to do

  • normative

    wider still; refers to anything that sets a standard, common in social sciences

Antonyms
  • epistemic

    in linguistics, the contrasting category of modality that concerns knowledge and belief rather than obligation

Grammar Patterns

deontic + noun (modality, logic, verb, operator)

Usage Note

Almost always used before a noun, most commonly in the phrases 'deontic modality' (linguistics) and 'deontic logic' (philosophy).

Common Mistakes

Epistemic and deontic modality are the same thing.
Deontic modality concerns obligation and permission; epistemic modality concerns knowledge, belief, and certainty.
These are two distinct categories of modal meaning in linguistics.

Word family

Synonym discussion

Sense: adjective/1

Deontic is used almost exclusively in linguistics and formal logic to describe expressions that mark duty, obligation, or permission (deontic modality, deontic logic). Deontological belongs to moral philosophy and refers to ethical systems where the rightness of an act depends on its conformity to duty rather than its consequences — as in Kant's deontological ethics. Prescriptive is broader and more everyday: a prescriptive rule simply tells you what to do, without the technical apparatus. Normative describes anything that sets a standard or expectation; it is wider still and common across the social sciences. Obligatory is the most general, meaning simply 'required.' In a linguistics paper, write deontic modality, not deontological modality; in an ethics essay, deontological theory, not deontic theory.

deontological ↗prescriptivenormative ↗obligatory ↗

Common collocations

Nouns

  • deontic modality
  • deontic logic
  • deontic verb
  • deontic operator
  • deontic meaning
  • deontic constraint
  • deontic language

Etymology

GreekEnglish

From Greek deon (δέον) 'that which is binding, duty,' from the verb dei 'it is necessary.' The term entered English in the mid-20th century through work in philosophical logic and linguistics on modal systems.

First known use

1951

1951, in the meaning defined above