[alwillis]

> I’ve got many catholic relatives that describe themselves as vegetarians and eat fish

Those are pescatarians.

It's like how a tomato is a fruit, but it's used as a vegetable, meat has traditionally been the flesh of warm-blooded animals. Fish is the flesh of cold-blooded animals, making it meat but due to religious reasons it’s not considered meat.

[roxolotl]

Right exactly. The point is that dictionary definitions don’t always align with cultural ones.