What does «cuanto» mean in Spanish?

What a quantity.

Examples of use in Spanish: "¿cuántas manzanas quieres?".
It indicates an undetermined quantity and is used at the same time as tanto.

Examples of use in Spanish: "cuantas personas", "cuantos tantos pareceres".
What.

Examples of use in Spanish: "¡cuánta gracia tiene!".
All.

Examples of use in Spanish: "se llevó cuantos objetos había sobre la mesa".
Some.

Examples of use in Spanish: "unos cuantos amigos".
What a quantity.

Examples of use in Spanish: "¿cuántos han muerto?".
All that.

Examples of use in Spanish: "¡si supieras cuánto me dijo!".
In what way.

Examples of use in Spanish: "ya conoce cuánto le estimo".
What a price.

Examples of use in Spanish: "¿cuánto vale eso?".
What a time.

Examples of use in Spanish: "¿cuánto duró su discurso?".
Castellanization of quantum.
(cuanto a; en cuanto a) Regarding, with respect to.
(cuanto antes) As soon as possible.
(cuanto más) All the more so; all the more reason.
(en cuanto) As soon as.
(por cuanto) Since.