Etymology
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breakthrough (n.)

also break-through, "significant or sudden advance," 1918, in a military sense, from the verbal phrase; see break (v.) + through (adv.). The verbal phrase is attested from c. 1400 in the sense "overcome or penetrate a barrier." The meaning "abrupt solution or progress" is from 1930s, on the notion of a successful attack.

updated on October 23, 2022

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