Short glossary on hover

It would be nice to have a short glossary on hover for words that we use on the committee that might not be clear to outsiders.

Here are a couple that we have gathered so far:
Delegate - A person who represents an ECMA International member organization
Member - An organization that has joined ECMA
Champion - A person who presents and supports a proposal through the tc39 process
Contributor - A person who is working towards making a proposal a reality
Proposal - a proposed new language feature that has not yet been added to the language
Ecma international- A standardization body that takes care of the ECMAScript spec
TC39 - Technical Committee 39, a committee organized by Ecma international
ECMA-262 - the official name of the ECMAScript specification
ECMA-402 - the official name of the internationalization specification

Any other suggestions?

Start by reviewing the glossary terms listed in the issue and the site's current presentation of committee terminology. Define how the terms should appear on hover and confirm that all listed definitions are included and readable. Done means the glossary is available to outsiders without obscuring the surrounding content.