What does "fraternization" mean?

The act of fraternizing or uniting as brothers.

Fraternization

Common synonyms include: affiliation, alignment, alliance, amalgamation, association, association.

noun

noun ·Uncommon ·College level

Noun

1
The act of fraternizing or uniting as brothers. countable, uncountable
2
associating with others in a brotherly or friendly way; especially with an enemy wordnet
3
Having a friendly relationship with the enemy. countable, uncountable
4
any type of disallowed, supposedly unethical and unprofessional, social or intimate contact between employees, especially between different gender, class or rank. US, countable, derogatory, uncountable

"Company policy precludes fraternization between co-workers."

From French fraternisation.