vs
QUICK ANSWER
"A las once" is a phrase which is often translated as "at eleven", and "cuarto" is an adjective which is often translated as "fourth". Learn more about the difference between "a las once" and "cuarto" below.
a las once(
ah
lahs
ohn
-
seh
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. at eleven
A las once tengo cita con el dentista.I have an appointment with the dentist at eleven.
b. at eleven o'clock
No olvides que a las once tenemos una videoconferencia con nuestro cliente de Nueva York.Don't forget we have a videoconference with our New York client at eleven o'clock.
cuarto, el cuarto(
kwahr
-
toh
)An adjective is a word that describes a noun (e.g., the big dog).
a. fourth
Entra al edificio y toma el ascensor al cuarto piso.Enter the building and take the elevator to the fourth floor.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).