Entry from British & World English dictionary
Definition of kryptonite in English:
(In science fiction) an alien mineral with the property of depriving Superman of his powers: figurative girls of her sort are kryptonite to the developing hearts of adolescent boys
More example sentences
- Remember when polystyrene foam was environmental kryptonite?
- These things are like kryptonite to terrorists.
- Did the Raiders uncover Pennington's kryptonite?
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