Emigration is the act of leaving your own country in order to live in another one. You emigrate; the leaving itself is emigration.

Emigration移民出國 is the act of leaving your own country in order to live in another one是指離開自己的國家、去另一個國家定居這個行為。You你 emigrate去移民出國；the leaving itself這個離開的動作本身 is emigration就叫 emigration。

English is fussy about direction here, though Chinese often is not. Emigration is the going-away. Immigration is the arriving — same journey, two names, depending which country you are standing in. A family that leaves Taiwan for Canada is in emigration from Taiwan’s point of view, and in immigration from Canada’s.

English英文 is fussy about direction here在這件事上很講究方向，though Chinese often is not不過中文通常不太區分。Emigration emigration 說的是 the going-away「離開」，Immigration immigration 說的是 the arriving「抵達」——same journey, two names同一趟旅程、兩個名字，depending which country you are standing in差別只在你站在哪個國家看。A family that leaves Taiwan for Canada一個從台灣搬去加拿大的家庭，from Taiwan's point of view站在台灣的角度來看 is in emigration算是 emigration，and而 from Canada's站在加拿大的角度來看 in immigration算是 immigration。

News writers talk about an “emigration wave” when many people leave at once.

when many people leave at once當很多人同時離開的時候，News writers新聞寫作者 talk about an "emigration wave"會說「移民潮」。

It is a slightly formal, forms-and-newspapers word. In everyday talk people often just say they moved abroad.

It它 is a slightly formal, forms-and-newspapers word是個略正式、常出現在表格和新聞裡的字。In everyday talk日常口語裡 people often just say they moved abroad人們通常就直接說自己搬到國外去了。

It is not the same as migration in the wide sense, which can also mean animals moving with the seasons, or people moving inside one country.

It它 is not the same as migration in the wide sense跟廣義的 migration（遷徙）不一樣，which can also mean animals moving with the seasons廣義的 migration 也可以指動物隨季節遷徙，or people moving inside one country或是人在同一個國家境內搬遷。