Definition of breakthrough
1 warfare : an offensive military assault that penetrates and carries beyond a defensive line
2 : an act or instance of moving through or beyond an obstacle <a breakthrough in the talks between the region's leaders> <a breakthrough agreement>
3a : a sudden advance especially in knowledge or technique <a medical breakthrough>b : a person's first notable success <a breakthrough novel> <the actress's breakthrough performance>
Examples of breakthrough in a sentence
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.
First Known Use of breakthrough
BREAKTHROUGH Defined for English Language Learners
Definition of breakthrough for English Language Learners
: 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
BREAKTHROUGH Defined for Kids
Definition of breakthrough for Students
: a sudden advance or successful development <a breakthrough in medical research>
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