ref ‧ or ‧ ma ‧ tion /ˌrefəˈmeɪʃ ə n $ -fər-/ BrE AmE noun
[ Word Family: noun : ↑ form , ↑ formation , ↑ transformation , ↑ reformer , ↑ reform , ↑ reformation , ↑ reformist , ↑ transformer , ↑ formlessness ; verb : ↑ form , ↑ reform , ↑ transform ; adjective : reformed, ↑ reformist , ↑ formless ; adverb : ↑ formlessly ]
1 . [uncountable and countable] formal when something is completely changed in order to improve it
2 . the Reformation the religious changes in Europe in the 16th century, that resulted in the Protestant churches being established