LLC (Limited Liability Company)A business structure that combines the liability protection of a corporation with the tax flexibility and operational simplicity of a partnership. LLC owners, called members, are generally not personally responsible for the company's debts and liabilities, meaning their personal assets are protected. LLCs can choose how they want to be taxed, either as a sole proprietorship, partnership, S-corp, or C-corp, making them one of the most versatile business structures available.