SINCE 1828

An Encyclopædia Britannica Company

once that

conjunction

Definition of once that

:once

First Known Use of once that

1874

Seen and Heard

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WORD OF THE DAY

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smooth or hairless

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Its recent usage is hard to shrug off.

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9 Slang Words With Academic Origins

Class is in session.

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Words of the Year: 1066

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Irregardless

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

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Weird Plurals

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

Word Games

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Challenging Vocabulary Quiz Returns!

No tricks, just difficult words.

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Name that Color!

NEW! Additional colors! More obscure than before!

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Name That Thing

Name That Thing

Test your visual vocabulary with our 10-question challenge!

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Syn City

Build a city of skyscrapers—one synonym at a time.

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