A‧the‧nae‧um Club, the /ˌæθɪˈniːəm ˌklʌb/ (also the Athenaeum)
a GENTLEMAN'S CLUB in central London, especially for men who have done important work in science, literature etc. Since 2002 women have been allowed to join the club.

[TahlilGaran] Dictionary of Contemporary English ▲