President

1. One who is elected or appointed to preside; a presiding officer, as of a legislative body.
2. The chief executive officer of the government in certain republics; as, the president of the United States.
3. Precedent.
4. A protector; a guardian; a presiding genius.
5. Occupying the first rank or chief place; having the highest authority; presiding.
6. The chief officer of a corporation, company, institution, society, or the like.