Short for third culture kid - and if you've never had a word for the thing you're about to read, this page is for you.
The term was coined by researchers studying children who grew up outside their parents' home culture - not American, not local, but something built from both: a “third culture,” shared with other people who'd also grown up moving between worlds rather than with people from either culture individually.
It's not one specific story. It covers military kids, missionary kids, diplomat kids, international-school kids, kids of parents who just took a job abroad, kids who moved for no reason bigger than their parents wanting something different. What's shared isn't the reason for moving - it's growing up genuinely between cultures during the years that shape how you see the world, rather than settled inside just one of them.
There's no test, and you don't need to have moved a certain number of times or lived on a certain number of continents. Most people who'd call themselves a TCK recognize several of these, even if they'd never have used the term before reading it:
If most of that felt familiar, the word probably applies to you, whatever your specific path was. If only one or two did, that's worth something too - you don't need a fully nomadic childhood for a cross-cultural background to have shaped how you relate to people.
Naming it changes something. It turns a vague, private feeling of not-quite-fitting into a shared experience other people have already described - and once it has a name, it's something you can look for in someone else, not just carry alone.