some idea

  1. She got some idea.
  2. She got some ideas.
    Which one is correct?

She got an idea.
She got some ideas.

‘she got some idea’ is correct in the contexts of “began to understand”. For example:
'At first she didn’t understand it at all but she persevered until she got some idea of how it worked and she developed her understanding from there.

I have come across another sentence:
“This graph will give you some idea of levels of ability”.
So it gives me an idea that ‘idea’ can be employed as a plural noun with ‘some’.
Is there any grammar ruling?

some idea = begin to understand.

Do you mean to say ‘some idea’ is a fixed phrase with the meaning ‘begin to understand’?
So it is a some sort of idiom. Is my inference correct?

I don’t see it as idiomatic, just one possible meaning.

Hi Allifathima,

‘Idiomatic use’ usually refers to when a word or phrase can’t really be explained logically but is something that is special or peculiar to a particular language. Using ‘some’ in your sentence is simply an example of how ‘some’ can be used to express the idea of ‘to a certain extent’ rather than ‘to a complete or large extent’. If you ask someone a question like this: Can you give me some idea of how this machine works? you are asking for part of an explanation and not a complete explanation.