Disable Search / Dictionary Popup Window in iTerm2
You can disable this feature by opening iTerm2 preferences, then search for "dictionary". You can navigate to this preference by opening preferences, clicking "Advanced", and then scrolling through the list until you see "General" and "Perform dictionary lookups on force press".

You don't need to restart iTerm2 for this change to take effect.

This was tested while using macOS Catalina with iTerm2 3.3.6. I have "force click and haptic feedback" disabled in the system's Trackpad Point &amp; Click settings.