This is the 11710th most frequent Polish word.
komuną
"Komuną" in English refers to "commune" or "a group/community living collectively," and colloquially it can mean "communism" or "the communist era."
In this sentence, "komuną" refers to the political system of communism that existed in Poland in the past.
Dawno temu Polską rządziła komuna.
A long time ago, Poland was ruled by the commune.
Here, "komuną" is derived from "komunia" and refers to the religious event of First Holy Communion in Christian traditions.
Spotkaliśmy się na komunie u mojego kuzyna.
We met at my cousin's First Communion.
In this case, "komuną" denotes a community or collective often associated with mutual living or intentional societies.