- Some person.
- Is someone there?
- Logically related to anyone, everyone, and no one. Becomes no one via negation.
- Did anyone help with the clean-up effort?
- Yes, someone helped yesterday, but no one did today because everyone was too busy.
someone (plural someones)
- A partially specified but unnamed person.
- Do you need a gift for that special someone?
- The someones under discussion were eventually arrested.