There are a lot of terms out there to describe different aspects of climbing. I hear new terms all the time and am sent searching websites to find out what they mean. So, I looked through a bunch of websites to find the simplest ones. The one below has the most common terms with easy to understand definitions.
This next list is quite a bit longer and has terms that are more obscure. I recommend it if something you hear isn’t on the first one.
Don’t feel bad for not knowing terms when people use them. They didn’t know that either at one point or another. Embrace the learning curve.