Word of the Week index-learning noun Superficial knowledge, such as may be acquired by casually browsing a book or studying its index. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on WhatsApp (Opens in new window)MoreClick to email a link to a friend (Opens in new window)Click to share on Pinterest (Opens in new window)Click to print (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Like this:Like Loading...