How to tweak the adobe acrobat reader "lookup word" feature to go anywhere you want (google search/wikipedia or anything you wish) instead of going to dictionary.com. I've seen it asked but never answered so here is my solution - it involves redirecting and works as is on firefox and chrome but there is probably an equivalent solution in other browsers.
Step 1 - get the requestly extension (reportedly available for firefox & chrome)
Step 2 - open the extension (marked 1 in picture) and add a rule (marked 2).
Step 3 - Select "replace host" as rule type
Step 4 - fill rule as follows:
Step 5 - save rule and it works