1. A language: Tagalog is the national language of the Philippines. It is spoken by a majority of Filipinos, and is used in government, education, and media. It is an Austronesian language, meaning it is part of a large family of languages spoken across Southeast Asia and Oceania.
2. A people: Tagalog refers to the people who speak Tagalog, who are mainly from the Tagalog region of Luzon Island in the Philippines.
It's important to note that "Tagalog" is often used interchangeably with "Filipino" in the Philippines. However, "Filipino" is the official name of the national language, while "Tagalog" refers to the language spoken by the Tagalog people.