SINCE 1828

An Encyclopædia Britannica Company

undeformed

play

adjective un·de·formed \ˌən-di-ˈfȯrmd, -dē-\

Definition of undeformed

: not deformed : free of deformity or deformation undeformed rocks/sediments

1673

First Known Use of undeformed

1673

Seen and Heard

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

show

WORD OF THE DAY

torpedo

play

a weapon for destroying ships

Words at Play

alt-5926e94cc0e45

'Climate' Change

No denying this word's history

alt-5925b73b3a62e

'Author' is a Verb

Beyond the mere act of writing

alt-592708149cf54

Don't Catch 'Flack' for Using 'Flak'

How a word for antiaircraft guns came to refer to PR pro

Plural Words With Multiple Spellings

Multiple spellings for "multiple" words.

Ask the Editors

Is it wrong to use 'decimate' to mean 'destroy'?

Language changes

The Serial Comma

Why don't they call it the Merriam-Webster comma?

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless

Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals

Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

Winning Words from Scripps Spelling Bee Quiz

Can you outdo past winners of the Spelling Bee?

Take the quiz

peter-bruegel-tower-of-babel-painting

Where in the World? A Quiz

Do you know what languages these words come from?

Take the quiz

True or False?

Test your knowledge - and maybe learn something along the way.

Take the quiz

Add Diction

Build a chain of words by adding one letter at a time.

Play the game