Crossdrssing is the act of wearing clothes traditionally or stereotypically associated with a different gender. For example men wearing dresses and skirts or women wearing suits could be considered crossdressing. The majority of crossdressers who post about it online seem to be men who crossdress in feminine clothes, but women and people of all genders can be crossdressers too. Even a genderfluid/demifluid person can still crossdress by dressing up as a gender they do not identify with currently. Its all in how you want to view it. If putting on masculine clothes feels like cross dressing to you, than it is. :)