noun

frat

fraternity

He joined a frat in his freshman year.

He joined a fraternity in his first year.

They are having a frat party tonight.

They are having a fraternity party tonight.

((to join a)) frat to become a member of a fraternity He joined a frat in his freshman year.

((a)) frat ((party/house)) a party or house belonging to a fraternity They are having a frat party tonight.

Synonyms: fraternity, brotherhood, club

Short for 'fraternity', from Latin 'frater' meaning 'brother'.

Think of 'frater' (brother) – a 'frat' is a brotherhood of students. This is a very American term.

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