Google was introduced a different format last month for the definitions it sometimes displays at the top of its search results, something was missing. The source URL wasn’t a clickable link. That’s currently been fixed.
Here is an example, the definition box that Google shows for a “define digital marketing” search:
The URL shown below the definition formerly wasn’t clickable. Instead, the simply method to click through to the source of the definition was to use the smaller “Source” link at the very end of the box.
In cases where Google is drawing a definition from numerous sources, rather than from one in particular, no URL is shown, but the sources are mentioned below the definition box and are clickable links:
To see definitions similar those above, put “define” in front of the term you need defined, such as:
define green chemistry
define Avinash kaushik
define google search
Instead, using “what is” often works.