Defintion of "Cross-Dressing"?

Isn't cross-dressing when you're doing it to deliberately try to look like the other sex?

Just wearing clothes because they are comfy and fit better isn't cross dressing, IMO.

The OED says this about crossdressers:
Copied below:

1950 L. S. London & F. S. Caprio Sexual Deviations i. 20
Moll classified various varieties of transvestism as follows:..(2) homosexual cases, in which cross-dressings constituted part of the contrary state; (3) heterosexual cases, where the sexual impulse is normal and in which cross-dressing constitutes part of a contrary sexual state [etc.].

1971 Daily Tel. 10 Dec. (Colour Suppl.) 21/4 Many transexuals are also transvestites, with cross-dressing an essential part of their all-out desire to assume the opposite role.

1985 Times 21 Jan. 8/6 Androgynous clothing is a challenge to fixed concepts of femininity/masculinity, and once that demarcation line was established in Christian society, cross-dressing became subversive.

Or maybe it is...Ive looked up a few definitions, which seem quite broad. Which may be fine. The problem is associating cross dressing with being transgender; the wiki page states 'Cross-dressing is not synonymous with being transgender.'

Wearing clothes designed for the opposite sex, for reasons other than practicality.

I'm not sure thats quite right, for women at any rate - think of female celebs wearing tuxedos. Thats for style rather than practicality but I wouldn't have thought it was 'cross dressing"?

It will become ever harder to define. Women’s shoes I notice are now available up to uk size 8 and sometimes 9; I have had fb ads for NB shirts (do the buttons alternate as to which side they are on??), snag tights are evidently for everyone, etc.
Years ago there was a shop in London which sold large size women’s style/fetish/drag shoes but I imagine there is far less need.
Also it really depends on fashions - shift dresses and stretchy material are v accommodating. And I remember fashion for first pregnancy being far easier but for second DC it was far tighter cut so I needed to buy more maternity stuff and much earlier. So it is going to be vv hard as clothing is subjective. And my GC stance says who cares. To some extent I’d see silky lingerie as a bit of a female fetish thing - look and feel suggest they are worn for non practical reasons so can one argue against men wearing similar? And where would Ann Summers be if it weren’t.

Can anyone draft a suggested legal definition of crossdressing without mentioning agp or using regressive gender stereotypes?

If cross dressers are to be able to self id into women's sports, changing rooms etc...... Will we not need a robust definition of cross dressing so that it can written into the law? Otherwise any man can claim to be a cross dresser, be included under the trans umbrella and therefore be included in female sport etc......

People cross dress for many varied reasons and to lots of different extents.
Its not always a sexual thing.

Society allows women to cross dress but often reacts negatively if men do it.
No one would like twice at me if I wore my partners shirt but there would I'm sure be stares and comments should he step out in one of my tops.

Good question, OP.

Maybe someone will be able to explain it. As with so many things, we are lacking good, agreed upon definitions.

Wearing clothes for practical reasons such as fit, wear, protection or comfort is not cross dressing.
I wear mens t-shirts because I have wide shoulders and they fit. The way womens t-shirts are cut means they don't fit me at all. Just wearing a larger size doesnt work. The fabric cuts into my armpits, and rides around when I walk or do anything active. I can't be bothered with constantly adjusting my clothing or being uncomfortable if I'm active.
As far as I'm concerned, ''mens t-shirts'' are just t-shirts. I'm wearing them for comfort, they don't have any intrinsic meaning or value. They aren't signalling masculinity.