Great variety may be attained in writing the definitions and as
wide a scope as possible must be left to the constructor. The only
requirement is common sense. This means that the definitions may be
of the safe and sane dictionary kind, may be literary or
historical, may employ secondary meanings cleverly, may be
legitimately funny. Synonyms that are too far removed from the word
and what Gelett Burgess calls “smarty-cat definitions” should be
avoided.