Definition of breakthrough
- a breakthrough in the talks between the region's leaders
- a breakthrough agreement
- a medical breakthrough
- a breakthrough novel
- the actress's breakthrough performance
Researchers say they have made a major breakthrough in cancer treatment.
The police have announced a breakthrough in the murder case.
This job could be the breakthrough she's been waiting for.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'breakthrough.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: a sudden increase in knowledge, understanding, etc. : an important discovery that happens after trying for a long time to understand or explain something
: a person's first important success
What made you want to look up breakthrough? Please tell us where you read or heard it (including the quote, if possible).
of yeast or being unsettled or frivolous
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