A term limit is a legal restriction on the number of terms a person may serve in a particular elected office. When term limits are found in presidential and semi-presidential systems they act as a method of curbing the potential for monopoly, where a leader effectively becomes "president for life". This is intended to protect a republic from becoming a de facto dictatorship. Term limits may be a lifetime limit on the number of terms an officeholder may serve, or a limit on the number of consecutive terms.