Legal Definition of Obscenity

• Whether "the average person, applying contemporary community standards", would find that the work, taken as a whole, appeals to the prurient interest,
• Whether the work depicts/describes, in a patently offensive way, sexual conduct specifically defined by applicable state law,
• Whether the work, taken as a whole, lacks serious literary, artistic, political or scientific value.

See Miller v.California, U.S. Supreme Court