fraternity

noun

1. (countable, uncountable)The quality of being brothers or brotherly; brotherhood.
2. (countable, uncountable)A group of people associated for a common purpose.

   “The decision of Judge Stafford [to dismiss the case] represents an exhibition of raw power wielded by the well-organized fraternities of the medical profession against consumer groups working in the interest of women's health care.”

3. (Philippines, US, countable, uncountable)A social organization of male students at a college or university; usually identified by Greek letters.

   “Colin Schlank said he rushed a fraternity because he wanted to expand his social circle. […] “They’re called social fraternities for a reason,” he said, “because you’re trying to branch out, you’re trying to meet new people.””