I don't like dictionaries, I like research. Merriam-Webster 2018 says, sense 1 abc [gramatical gender] but sense 2 is all about sex. >2a SEX ... >2b the beha

I don't like dictionaries, I like research. Merriam-Webster 2018 says, sense 1 abc [gramatical gender] but sense 2 is all about sex. >2a SEX ... >2b the behavioral, cultural, or psychological traits typically associated with one sex http://web.archive.org/web/20181125203538/https://www.merriam-webster.com/dictionary/gender http://web.archive.org/web/20181125203538/https://www.merria... it doesn't mention gender identity, but gender identity is a perfectly good word for gender identity. I don't have access to the OED here but I'm sure we'd see a similar timeline.