What does the Spanish word es mean?

"Es" is the third person singular form of the verb "ser" in Spanish. It translates to "is" or "it is" in English.

Here are some examples:

* El cielo es azul. (The sky is blue.)

* Ella es mi hermana. (She is my sister.)

* Esto es un libro. (This is a book.)

* Es un día soleado. (It is a sunny day.)

The word "es" is a very common and important verb form in Spanish, so it's essential to understand its meaning and usage.