SEXAGENARIANISM Meaning of SEXAGENARIANISM in English ˌ ̷ ̷ ̷ ̷ ̷ ̷ˈ ̷ ̷ ̷ ̷əˌnizəm noun( -s ) : the state of being a sexagenarian Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012