1. A person who owns and operates a business as an individual, without any partners or shareholders
She is the sole proprietor of the boutique, making all business decisions independently.
Ela é a proprietária única da boutique, tomando todas as decisões comerciais independentemente.
2. An individual who has complete ownership and control of a business enterprise
As a sole proprietor, he is personally liable for all business debts.
Como proprietário único, ele é pessoalmente responsável por todas as dívidas comerciais.