つまり
Usage
つまり is used together with the sentence terminator ということだ to indicate that the preceding explanation is being summarized in an easily-understood way.
Examples
この大学の学生は約一万人で、うち留学生は約一千人である。つまり、一割は留学生ということだ
There are about 10000 students at this university and about 1000 of them are from abroad. In other words, 10% are overseas students.
休暇は一年に12日あります。つまり一ヶ月に1日は休めるということです。
There are twelve holidays a year. In other words, we can take one day off a month.
あの人は私の大叔父、つまり祖父の弟だ
He is my grand-uncle, that is to say, my grandfather's brother
このサイトは、会員以外のお客様にはご覧いただけないことになっている。つまり、会員限定のサイトなのだ。
This site cannot be viewed by non-member visitors. In other words it is a members-only site
Good to know
Can be used when providing additional explanation by rewording or rephrasing something (example 3)
Expressions such as のだ can be used after つまり. In this case, のだ is used for rephrasing something (example 4)
A little more polite than のに