hurried off to catch her train

[ullas84]

''İn the taxi on the way to Vıctoria station I asked her out to dinner.She was silent for a moment than said, 'All right wednesday evening'.
After she had hurried off to catch her train,I realized I didn't know if she was married or not.''
The enemy , by Desmond Bagley.

What is the function of preposition ''off'' in the sentence above?

Does the meaning change if I don't use ''off''' ;

After she had hurried to catch her train...................

 

[Myridon]

She hurried off = She hurried away from the speaker.
Without "off," you lose some of the sense that she left him standing there.

 

[Franco-filly]

It's an adverb, see the forum definition:
3. away from a place: to run off; to look off toward the west.

 

[JulianStuart]

In this case it is an adverb off - WordReference.com Dictionary of English
Cross-posted

 

[kentix]

She hurried off = She hurried away from the speaker.
Without "off," you lose some of the sense that she left him standing there.

Some words are necessary for grammar but grammar is not the only factor in writing. Style counts, too, and the job of some words is to provide extra nuance, to make the story richer and more interesting. She hurried off - she left him standing there. She hurried - it's less focused on him and more on her. But the story at this point seems to be about him, not her. So from his point of view she hurried "off" - away from him. (From her point of view she was hurrying toward her train.)