I don't log cross country time at all. However, if you are logging time toward the ATP, a cross country is a flight which reaches a point more than 50 nm from the point of departure, and doesn't require a landing at a point other than the point of departure.

If you're got your ATP, nobody cares whether your flight time is cross country.

I've flown half way around the world and not logged it as cross country. What would be the point, and why would anyone care?

If an interviewer is going to try to determine if you've logged cross country improperly on a 60 mile flight that returns to the point of origin, then 1) the interviewer is an idiot, and 2) you really should find somewhere better to work. After all, honestly, who gives a stuff? Yes, legally it's cross country, for the purposes of an ATP. If you're logging cross country for any other reason, the definition changes, and generally requires a landing at a point other than the point of departure. In this partcular case, it really doesn't matter. If your'e working as an airline pilot, you should have your ATP, and logging cross country time becomes fairly pointless.