an unknown quantity

This page is about the idiom an unknown quantity.

Meaning: If a thing or a person is an unknown quantity, not much is known about them.

For example:

  • The Saints have signed a new player, but he's an unknown quantity at this stage as very few people have seen him play.

  • We've all heard stories about a great new Ferrari engine, but it's still an unknown quantity as far as racing is concerned.

Quick Quiz:

Our new sales manager is an unknown quantity because

a. we don't like her

b. we don't need her

c. we haven't met her

Idiom of the Day

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Contributor: Matt Errey