1. most inclined to form or belong to exclusive groups; most exclusive or clannish
Usage: superlative form of cliquey

Examples

• The private school had the cliquiest atmosphere of any institution she had attended.
• Among all the social clubs, theirs was considered the cliquiest.
• The cliquiest students sat together at lunch every day.
• She found the honors program to be the cliquiest part of the school.
• The country club was known as the cliquiest organization in town.
• Even in the cliquiest environments, she managed to make friends.