QUICK ANSWER
"El" is a noun which is often translated as "el ferrocarril elevado", and "gato" is a noun which is often translated as "el gato". Learn more about the difference between "el" and "gato" below.
el(
ehl
)A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
1. (colloquial) (transport) (United States)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
Regionalism used in the United States
a. el ferrocarril elevado (M)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
Saul rode the El to work for years.Saúl tomó el ferrocarril elevado para ir al trabajo durante años.
gato(
ga
-
do
)A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
a. el gato (M)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
One of the Argentines picked up a guitar and started playing a gato.Uno de los argentinos tomó una guitarra y empezó a tocar un gato.
