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1 [countable] a useful machine, tool, instrument etc that has been invented:
The dishwasher is a wonderful invention.
2 [uncountable] the act of inventing something:
The invention of the computer has revolutionized the business world.
3 [uncountable and countable] a story, explanation etc that is not true:
They subsequently admitted that the story was pure invention.
4 [uncountable] the ability to think of new and clever ideas:
With such powers of invention he should get a job easily.

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