Definition of some pronoun from the Oxford Advanced American Dictionary

     

    some

     pronoun
    pronoun
    NAmE//sʌm//
     
    some (of somebody/something)
     
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  1. 1used to refer to an amount of something or a number of people or things when the amount or number is not given Some disapprove of the idea. You'll find some in the drawer. Here are some of our suggestions. In negative sentences and questions any is usually used instead of “some”:I don't want any.Do you have any of the larger ones?However, some is used in questions that expect a positive reply:Would you like some?Weren't you looking for some of those?
  2. 2a part of the whole number or amount being considered All these students are good, but some work harder than others. Some of the music was weird.
  3. Idioms
    … and then some(informal)
     
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    and a lot more than that We got our money's worth and then some.
See the Oxford Advanced Learner's Dictionary entry: some