a pound to a penny
- idiom
- UK
- You can bet a pound to a penny that it will rain tomorrow.
Examples
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It’s a pound to a penny they’ll cancel the match if it rains.
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A pound to a penny, she’ll be promoted before the end of the year.
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A pound to a penny he’ll forget her birthday again this year.
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I believe that, a pound to a penny, she will win the competition.
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A pound to a penny, the team will win their next match.
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You can count on it being a pound to a penny that he will arrive late.
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A pound to a penny, she will forget to send the invitations again.
Synonyms
Very likely to happen or be true
Very likely to happen or be true
To be very sure that something will happen
Very likely to happen
You would bet on it because it is very likely to happen
Antonyms
How Certain
Surface Forms
Morphology
a + pound + to + a + penny
The phrase uses a numeric/odds contrast (a pound versus a penny) which gives a clue that one outcome is far more likely, so there is some compositional logic. However, the conventional use of 'X to Y' as expressing betting odds/probability and the idiomaticized meaning 'very likely' is not fully predictable from the words alone and relies on cultural/figurative knowledge, so it is only partially transparent to learners.
Etymology
The saying a pound to a penny comes from betting: imagine someone bets a whole pound while the other person puts only a penny, so the first person must be very sure the result will happen. So, the phrase means 'almost certain' or 'very likely'.