Noun
Used other than figuratively or idiomatically: see weaker, sex.
(now offensive) Women; the female gender.
Source: en.wiktionary.orgMost men act so tough and strong on the outside because on the inside, we are scared, weak, and fragile. Men, not women, are the weaker sex. Jerry Rubin
To call woman the weaker sex is a libel; it is man's injustice to woman. Mahatma Gandhi
Men are actually the weaker sex. George Weinberg