being an unknown, undetermined, or unspecified unit or thing
some film or other
being an unspecified member of a group or part of a class
Some birds cannot fly
being of an unspecified amount or number
Give me some water
being of an appreciable or considerable amount or number
It may take some time
chiefly informal
important, striking, or excellent
That was some party!
no kind of
Some friend you are!
[Old English sum]