Is idol worship described in Judaism where the average person can understand?
Would this sum it up: idolatry connotes the worship of something or someone other than the Abrahamic god as if it were God.
Again, I'm not an expert in this field, but I think that the basic idea is as follows.
The first two of the 10 commandments are "I am G-d," and "You should not have any other Gods". IIMN many authorities say that only the first is included in the seven Noahide laws. Some religions are only a violation of the second commandment but not the first, as they believe in G-d, but they also believe in another power.
Thus, for a Jew, who is commanded to observe ALL the commandments, the Catholic religion falls under the umbrella of "Idol Worship," which is the halachic terminology for something that violates
any of those two commandments. But if a Gentile is only obligated to fulfil the first, it's likely that a Catholic is NOT in violation of the first.
Fellow Jewish DDFers, please correct me if I'm wrong about this.