SINCE 1828

An Encyclopædia Britannica Company

alternative energy

noun

variants: or less commonly

alternative power

Definition of alternative energy

: usable power (such as heat or electricity) that comes from a renewable or green resource alternative energy sources/technology

First Known Use of alternative energy

1959

Seen and Heard

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WORD OF THE DAY

fester

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to become worse as time passes

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A variant spelling with a long history

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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?

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In the Game of Thrones quiz, you learn some new vocabulary. (It’s quite safe, really. You will not die.)

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Test your visual vocabulary with our 10-question challenge!

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SCRABBLE® Sprint

SCRABBLE® fans, sharpen your skills!

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