# postulate

/ˈpɑstʃəˌɫeɪt/ (US) · CEFR C1 · Verb

Source: https://englishreference.com/word/postulate
Updated: 2026-10-17

## Definition

to suggest that something is true or exists, especially so you can use it as a starting point for an idea or argument.

For teachers: to suggest or assume the existence, fact, or truth of something as a basis for reasoning, discussion, or belief. Often used in scientific or philosophical contexts to establish a starting premise.

## Examples

- Scientists postulate that there is water on that distant planet.
- The researchers postulate that the new virus spreads more quickly in cold weather, though they need more data to be certain.
- Modern economic theories often postulate that individuals act rationally to maximize their own utility, even when real-world behavior suggests a more complicated psychological motivation.

## Synonyms

posit, propose, suggest, hypothesize, theorize

## Antonyms

reject, Deny

## Usage notes

- The verb is transitive and typically takes a 'that' clause or a direct object.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.