Stijn made a couple of sharp points in a comment on the post How is a Definition Different from an Explanation? (Part 1) (http://definitionsinsemantics.blogspot.com/2011/11/how-is-definition-different-from.html). He notes that there is a need for definitions to be short in certain circumstances, as when a user is scanning through a list. I think this is a good point. Users may be more in search mode when they are doing something like this. They want to know if the definition is close to some target they have in mind. Obviously, a full definition is not fit for such a purpose. So we might have three levels of definition: (a) a one-liner, suitable for lists; (b) a one-paragraph, suitable for a quick read with some detail - and display on a screen with scarce real estate; and (c) the full definition, as an authoritative reference. I have no problem with the last one being very long and including pictures - certainly more than half a page. ...
Various Set Of Science, Knowledge and Facts