English Reference
Noun

presumption

n. C / U
C1 Advanced US /pɹiˈzəmpʃən/ UK /pɹɪsˈʌmpʃən/ pre·sump·tion UK spelling presumption's, presumption's Law

n.an idea that you believe is true even though you do not have all the facts yet. It can also mean behaving in a way that is too confident or a bit rude.

n.the act of assuming something to be true in the absence of proof to the contrary; alternatively, behavior that oversteps the bounds of propriety. Often carries a legal or formal weight regarding the burden of proof.


SIMPLE

There is a presumption of innocence until a person is proven guilty.

CONTEXTUAL

The committee acted on the presumption that the budget would be approved by the end of the month.

COMPLEX

The legal system relies on the presumption of innocence to ensure that the burden of proof remains firmly with the prosecution throughout the trial.

Usage

Countable when referring to a specific belief; uncountable when referring to the general quality of being overconfident.

Stronger support in principle for development, meaning a more explicit presumption in favour of building in sustainable locations.

The Guardian· 17 Aug 2026

It meant councils were effectively working against a presumption that gambling premises should be permitted, leaving them limited ability to say no.

The Guardian· 11 Aug 2026

From Middle English presumpcioun, presumption, from Old French presumption and its etymon Latin praesūmptiō.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin praesūmptiō
Level C1 · Advanced
Frequency Frequent
Updated