vs
QUICK ANSWER
"La guitarra" is a form of "guitarra", a noun which is often translated as "guitar". "El" is a form of "el", a definite article which is often translated as "the". Learn more about the difference between "la guitarra" and "el" below.
la guitarra(
gee
-
tah
-
rrah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
el(
ehl
)A definite article is a word that identifies a noun as specific or known to the speaker (e.g., the girl).