A set of beliefs, customs, practices, and world-views that are shared (more-or-less) by a group of people. Not the same thing as a society, which may or may not include multiple cultures. In the US, there is such a mish-mash of cultures that hardly anyone can claim to belong to a single culture exclusive to all others. Sometimes a religion can be a part of a culture, and this is common in non-western societies. Some people, like the religious right, want to make their religion a part of US society, which is just a bad thing in general, the most obvious of reasons being that not everyone in the US is Christian.