a number of people or things, or an amount of something, when the exact number or amount is not stated:
I need some apples for this recipe.
My mother has inherited some land.
They're looking for someone with some experience.
The doctor gave her some medicine for her cough.
a number of people or things or an amount of something, but not all:
Some people believe in life after death.
She's been so depressed that some days she can't get out of bed.