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"Ellos" is a form of "ellos", a pronoun which is often translated as "they". "Uds." is an abbreviation which is often translated as "you". Learn more about the difference between "Uds." and "ellos" below.
Uds.(
oos
-
teh
-
dehs
)An abbreviation is the shortened form of a word or group of words (e.g., "UFO" = "unidentified flying object"; "p." = "page").
1. (formal) (second person singular)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
a. you
Estimados señores: Como solicitaron Uds., anexo les envío el reporte final.Dear Sirs: As you requested, the final report is attached.
ellos(
eh
-
yohs
)A pronoun is a word that stands in for a noun (e.g., she).
b. them (after prepositions)
Si confías en ellos, dales las llaves.If you trust them, give them the keys.
c. them (in comparisons)
Mi hermano y yo somos tan altos como ellos.My brother and I are as tall as them.