breakthrough

adjective
/ˈbɹeɪk.θɹuː/

Characterized by major progress or overcoming some obstacle.

Other meanings

Involving the contraction of a disease by a person with a decreased susceptibility, such as a person who has been vaccinated to help prevent that disease.

Related words

breakthrough bleeding

Example sentences

“They search for creative breakthroughs.”
Tatoeba · Igider · CC0
“It's a scientific breakthrough.”
Tatoeba · ddnktr · CC0

Where this comes from

This definition is adapted from “breakthrough” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above, published under CC BY-SA 4.0. This page is published under the same licence.