No that was not “just a definition”. Here is a definition.
“a 16th-century movement for the reform of abuses in the Roman Catholic Church ending in the establishment of the Reformed and Protestant Churches.”
Statements of opinions of causes and effects are not a definition.
“The effects of the Reformation have been far-reaching: Christian unity was shattered, personal liberty in religion affected every sphere of human activity, with the rise of the modern secular state, of capitalism as rugged individualism, and with the loss of the cultural solidarity, founded on a common faith, that had shaped Western civilization for almost a millennium.”
That would be laughable if not so tragically wrong.
source or opinion?
Here is a theological definition: A Theological movement of the 16th century with extensive cultural implications, that is often summarized by five tenants known as the “five solas”, namely: Scripture alone as a higher authority than church councils and popes, salvation by Grace alone, received by faith alone, in the atonement of Christ alone, for the glory of God alone. These five “solas” were in opposition to Roman Catholic teachings of faith plus meritorious works. Other points of contention were the existence of Purgatory, relics for merit, praying to saints, worship of Mary, infallibility of popes, and the nature of the real presence of Christ in the Eucharist.