Catholicism is the faith and the whole way of the Roman Catholic Church — the church that has the Pope in Rome. It is a noun: the religion, the teaching, the Mass, the priests, the long history.

Catholicism is the faith and the whole way of the Roman Catholic ChurchCatholicism是羅馬天主教會的信仰和整套生活方式——the church that has the Pope in Rome就是那個教宗在羅馬的教會。It is a noun這是個名詞：the religion, the teaching, the Mass, the priests, the long history指這個宗教、教義、彌撒、神父，還有它悠久的歷史。

A Catholic person belongs to that church; Catholic with a capital C is also the adjective. Though actually there is a quieter older word, catholic with a small c, which just meant “wide, for everyone”; you still meet it in careful writing, but daily talk almost always means the Roman church.

A Catholic person belongs to that church一個Catholic（天主教徒）就是屬於這個教會的人；Catholic with a capital C is also the adjective大寫的Catholic也是形容詞。Though actually there is a quieter older word不過其實還有一個比較少見的舊字，catholic with a small c小寫的catholic，which just meant "wide, for everyone"原本只是「廣泛的、給所有人的」的意思；you still meet it in careful writing在講究的文章裡還會遇到，but daily talk almost always means the Roman church但日常說話幾乎都是指羅馬天主教會。

In English-speaking countries Catholicism names one large Christian family, beside Protestant churches and the Orthodox churches.

In English-speaking countries在說英語的國家裡，Catholicism names one large Christian familyCatholicism指的是基督宗教裡的一大分支，beside Protestant churches and the Orthodox churches跟新教教會和東正教教會並列。

The word is formal: history class, news about the Pope, talk of schools and holidays. It is not a slang word and not a joke word, unless someone is being unkind on purpose.

The word is formal這是個正式的詞：history class, news about the Pope, talk of schools and holidays出現在歷史課、教宗的新聞，還有講學校和節日的話題裡。It is not a slang word and not a joke word它不是俚語，也不是拿來開玩笑的詞，unless someone is being unkind on purpose除非有人故意不厚道。