1. (n.) Precedent.

2. (a.) Occupying the first rank or chief place; having the highest authority; presiding.

3. (n.) One who is elected or appointed to preside; a presiding officer, as of a legislative body.

4. (n.) The chief officer of a corporation, company, institution, society, or the like.

5. (n.) The chief executive officer of the government in certain republics; as, the president of the United States.

6. (n.) A protector; a guardian; a presiding genius.