You can use the Search Files tool to search in all files known to contain definitions. To do this, select Known Definitions in the the dropdown list in the toolbar. Then complete your other search specifications and click the button.
Figure 16.3 A Known Definitions search
A file is known to contain definitions in one of two ways:
dspec:*active-finders*contains the keyword
dspec:*active-finders*contains the path of the tags database.
See "Dspecs: Tools for Handling Definitions" in the LispWorks User Guide and Reference Manual for more information about definition recording and tags databases.
LispWorks IDE User Guide (Windows version) - 25 Nov 2011