Meaning of SOMEONE in English
I. some ‧ one 1 S1 W1 /ˈsʌmwʌn/ BrE AmE pronoun
used to mean a person, when you do not know or do not say who the person is SYN somebody ⇨ anyone , everyone , no one :
What would you do if someone tried to rob you in the street?
Will someone please explain what’s going on?
someone new/different etc
‘When are you planning to hire someone?’ ‘As soon as we find someone suitable.’
Can you ask someone else (=a different person) to help you? I’m really busy.
Have Brooks or someone fax this to New York right away.
II. someone 2 BrE AmE noun
be someone to be or feel important:
Gerber was determined to be someone.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012