What is a true “Relapse”?

I’ve had this question for a while, but can’t seem to find a definitive answer to this. Some say relapsing is to fully engage on pornography, others say that just by peaking at suggestive content on social media counts as a relapse. Where do you draw the line? It’s obvious, no matter how “small” the content might be, it’s definitely not good for you if it suggests lust or triggers you. That being said, I’m curious to know your thoughts on the matter. Would you reset your streak or consider it a “relapse” if you intentionally glanced at a post on social media but proceeded to block it right away?