LLP. Another name for a Limited Liability Company, often used by professional associations. The partner or investor's liability is limited to the amount he/she has invested in the company. This setup typically prevents each partner from being held accountable for the wrongdoings of another partner. Although an LLP can be used in many fields, it is most commonly used in law or accounting firms. The laws relating to an LLP differ significantly between countries, and even from state to state.