XMPP is widely used these days, and is here to stay for a while. We have just published an XMPP glossary for you.
Roster, JID, full JID or bare JID, BOSH, caps, component, C2S and S2S, MUC, federation, dialback, PubSub, service discovery, resource, priority, transport, stanza, IQ, spim, ICE/STUN/TURN, presence, Jingle, and… Jabber. Maybe most of all these terms mean something to you. But some may not have a meaning in the XMPP context, or some just do not mean anything.
We have put up a small glossary for you. It is in our wiki. Please check it out here:
XMPP glossary: https://support.process-one.net/doc/display/XMPP/XMPP+glossary
You don’t need an account to read our wiki.
If you find that a definition is lacking, if you find an error, or if you simply want to extend it, please feel free: you are highly encouraged to contribute.