jalousies (noun) – a blind with adjustable horizontal slats for admitting light and air while excluding direct sun and rain.

i found this word in “A Rose for Emily”
by William Faulkner (1930)

“This behind their hands; rustling of craned silk and
satin behind jalousies closed upon the sun of Sunday afternoon as the
thin, swift clop-clop-clop of the matched team passed: “Poor Emily.”

now that i understand that this is a shutter i get a better understanding of the sentence. the blinds were stopping the sun from coming in so it gives you a sense of the setting.