Gender-nonconforming: Adjective to describe individuals whose gender identity, role, or expression differs from what is normative for their assigned sex in a given culture and historical period.

By this definition, gender-nonconforming is an awfully broad term as well. Doesn't that make every cross-dresser gender-nonconforming, or is it somehow important that your gender expression differs from what is normative at any time as opposed to only when you're 'en femme'? I always assumed that gender-nonconforming was a term for those who do not fully conform to 'normal' gender expressions, e.g. 'men in skirts'/partial cross-dressers/men who wear women's clothing but do not present as women. I always try to conform to 'normal' gender expressions, be it in male form or female form, just not always to the one that is normative for my assigned sex, so I wouldn't call myself gender-nonconforming.