I guess, I'd say that "spiritual" is something that moves you deeply (you spirit, soul, or whatever you'd like to call it).

This conversation has helped me hone in a bit on my meaning. Thank you.

People dive different things "spiritual", whether it's mystical or natural in origin. And "spiritual" can mean different things to different people. So, my label is inclusive.

If they were personally religious (spiritual) rather than socially/dogmatically religious, then it could work out. As an atheist, I'm not against spiritual beliefs, but their core values must align with mine - that is the important bit here. Obviously, communication about these things would determine where we align, and help determine if we could sustain a relationship, but it's certainly a possibility.

Note: I include a love of nature, humanism, etc. under the 'spiritual' label, as well as traditionally religiously spiritual.