fraternity-n; 4 Senses

Sense Number 1: association or club of male college or university students

Commentary: FRATERNITY[+association][+student][+college][+male]

John has stayed friends with his buddies from his fraternity.;
There are ten fraternities and twelve sororities on campus.
Their fraternity is known for its Friday afternoon keg parties.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: a religious or masonic group, usually secret

Commentary: FRATERNITY[+association][+religious][+secretive]

The fraternity of freemasons began as a secret society with religious overtones, but beliefs contrary to the divine rule of kings.
The Ku Klux Klan is a secret fraternity that goes back to Civil War times.

WordNet 0.0 Sense Numbers: 1b

Sense Number 3: people in the same occupation or profession

Commentary: FRATERNITY[+association][+occupation][+profession/+hobby]

Members of the medical fraternity are divided on this issue.
The hunting fraternity has been concerned about the sudden decline in the deer population.

WordNet 3.0 Sense Numbers: 2

Sense Number 4: a state of comradeship, brotherhood, fellowhip

Commentary: FRATERNITY[+state][+social][+camaraderie]

The ideals of the French Revolution were liberty, equality and fraternity.
The small river villages had lived for centuries in relatively peaceful fraternity.

WordNet 0.0 Sense Numbers: 2