vs
QUICK ANSWER
"Les" is a pronoun which is often translated as "them", and "los" is a definite article which is often translated as "the". Learn more about the difference between "les" and "los" below.
les(
lehs
)A pronoun is a word that stands in for a noun (e.g., she).
a. them
Vi a unos niños haciendo fuego en un solar. - ¿Puedes describirles?I saw some boys light a fire in a vacant lot. - Can you describe them?
3. (second person plural; indirect object) (Latin America)
Regionalism used in Latin America: all the countries in South America, Central America, and the Caribbean. Does not include Spain.
4. (formal) (second person plural; direct object) (Spain)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
Regionalism used in Spain
a. you
Alicia irá con ustedes para familiarizarles con nuestras instalaciones.Alicia will accompany you to familiarize you with our facilities.
los(
lohs
)A definite article is a word that identifies a noun as specific or known to the speaker (e.g., the girl).
A pronoun is a word that stands in for a noun (e.g., she).