1. As much, so much: This is the most common meaning of "tanto." It indicates a large quantity or amount.
* Ejemplo: "Tengo tanto trabajo que hacer." (I have so much work to do.)
* Ejemplo: "No me gusta tanto el café." (I don't like coffee that much.)
2. So: This meaning is used to express a degree or intensity.
* Ejemplo: "Estoy tanto cansado." (I'm so tired.)
* Ejemplo: "Tanto tiempo sin verte!" (So long without seeing you!)
3. Both, both of them: This meaning is used to refer to two things or people.
* Ejemplo: "Tanto Juan como María fueron a la fiesta." (Both Juan and Maria went to the party.)
* Ejemplo: "Tanto el perro como el gato son mis mascotas." (Both the dog and the cat are my pets.)
4. As much as, as many as: This meaning compares two quantities.
* Ejemplo: "Hay tantos libros en la biblioteca como en la librería." (There are as many books in the library as in the bookstore.)
* Ejemplo: "Gano tanto dinero como tú." (I earn as much money as you.)
5. As soon as: This meaning is used to express a short period of time.
* Ejemplo: "Tanto como llegué, me fui." (As soon as I arrived, I left.)
6. As long as: This meaning is used to express a duration of time.
* Ejemplo: "Tanto como él viva, yo estaré aquí." (As long as he lives, I'll be here.)
The specific meaning of "tanto" will depend on the context of the sentence.
It's also worth noting that "tanto" can be used as a noun meaning "a lot."
* Ejemplo: "Hay tanto que hacer." (There's so much to do.)
Overall, "tanto" is a versatile word in Spanish with many different meanings. Pay attention to the context to understand the meaning accurately.