a useful machine, tool, instrument etc that has been invented:
The dishwasher is a wonderful invention.
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.
the ability to think of new and clever ideas:
With such powers of invention he should get a job easily.