When you type “define moratorium” in google most of the time you get a pretty good explanation back. These are mostly hard to understand for kids.
It would be good to have a kids version of these. Maybe in the format of “define moratorium for kids”. Google can do it, but it could also be probably done by a dedicated site that is optimized for this template of a keyword query.
So you can decide which one is more appropriate for a given situation, and to give an as complete a view as possible of popular terms.
Collect an exhaustive list of definitions of popular terms and publish online.