This is the 215th most frequent German word.
über
"Über" means "over," "above," "about," or "across," depending on context.
In this sentence, 'über' is used as a preposition meaning 'about', referring to the topic of conversation.
Er spricht oft über seine Reisen.
He often talks about his travels.
Here, 'über' is a preposition indicating a spatial relationship, meaning 'over' or 'above', denoting the position of the bridge in relation to the river.
Die Brücke führt über den Fluss.
The bridge spans over the river.
In this instance, 'über' is used temporally to convey 'over the course of', referring to the duration of time.