SINCE 1828

An Encyclopædia Britannica Company

Law Dictionary

non est factum

noun non est fac·tum \ ˈnän-ˌest-ˈfak-təm, ˈnōn-ˌest-ˈfäk-tu̇m \

legal Definition of non est factum

: a defense by way of denial of a deed (as the execution of a contract)

Origin and Etymology of non est factum

New Latin, (it) is not (his or her) deed

Seen and Heard

What made you want to look up non est factum? Please tell us where you read or heard it (including the quote, if possible).

show

WORD OF THE DAY

loath

play

unwilling or reluctant

Words at Play

alt-5ade0f1ca7a0c

'Complement' vs. 'Compliment'

The distinction is clear (now).

Words from Letters in the Greek Alphabet

When English borrows from another alphabet

alt-5ada140ed3e28

'Preventive' or 'Preventative'?

alt-5ad8fc71357ed

Words We're Watching: 'Bluebeard,' the Verb

No, it's not a coiffure trend

Ask the Editors

2017 Word of the Year: Behind the Scenes

How we chose 'feminism'

video-title-words-of-the-year-1066

Words of the Year: 1066

Or, Why Pig Meat is Called 'Pork' and Cow Meat is Called 'Beef'

video-literally

Literally

How to use a word that (literally) drives some people nuts.

video-his-or-her

Is Singular 'They' a Better Choice?

The awkward case of 'his or her'

Word Games

Odd Habits and Quirks Quiz

Test your knowledge of strange human behaviors.

Take the quiz

cats-on-impossible-timber

More Confusing Words—Quiz

How many of these commonly confused words do you know?

Take the quiz

Spell It

Can you spell these 10 commonly misspelled words?

Take the quiz

Bee Cubed

Listen to the words and spell through all three levels.

Play the game