This is the 789th most frequent Swedish word.
filmen
"The movie" or "the film."
In this context, 'filmen' refers to a specific movie that the speaker watched yesterday. The definite form 'filmen' (the movie) is used.
Jag såg filmen igår.
I watched the movie yesterday.
In this sentence, 'filmen' again refers to a specific movie that both the speaker and listener presumably know about. Its usage implies prior knowledge or mention of the movie.
Vi kan titta på filmen senare.
We can watch the movie later.
Here, 'filmen' indicates a particular movie which is the subject of the discussion. It is used in the definite form as it points to a definite entity within the conversation.