WordNet
Trigger: !wordnet
Try it
Kagi would openhttps://wordnetweb.princeton.edu/perl/webwn?s=json+formatter&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=
Run @wordnet in Kagi for Kagi's own results from wordnetweb.princeton.edu only
URL pattern: https://wordnetweb.princeton.edu/perl/webwn?s=query&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=
Searches wordnetweb.princeton.edu, filed under Tools.