There's a lot of "pretending to understand" in meetings. Most people when presented with an unfamiliar term, or concept will just nod along and hope they'll be able to "backfill" the details and understanding later. I'm one of those people. My wife is not. She asks questions, lots of questions. Some of them are obvious and embarrassing but you know what? She gets answers and therefore understanding and often times the "obvious" question she asks actually has a non-obvious answer.

TLDR; Don't be afraid to ask "dumb questions" the rest of the room is probably thinking the exact same thing as you.