Watch a movie 看电影（可以是在家看电影，或者用手机，电脑等看电影）
I think I'm staying home to watch a movie.
我想我会待在家里看电影。

See a movie 看电影（到电影院看电影）
Do you want to go see a movie tonight?
你今晚想去看电影吗？

Movie 电影
Film 影片（比较正式、专业的说法）
How many Fast and Furious movies are there?
“速度与激情”有多少部了？
Zhang Yimou is my favourite Chinese film director.
张艺谋是我最喜欢的电影导演。

Blockbuster 大片
Avengers 4 was aguaranteed blockbuster. We all knew it would make a ton of money.
“复仇者联盟4”肯定是非常成功的大片。我们都知道它肯定会赚很多钱。

Box office hit 票房大卖
I didn't think the movie was any good but so many people bought tickets to see it, that it became a box office hit
我不觉得这部电影哪里好，但是大家都买票去看，它的票房就爆了。