The 26-year-old secured her third successive title with a 21.24m throw which smashed her personal best and equalled the world championship record set by the Soviet Union's Natalya Lisovskaya in 1987.
Her throw also claimed her a new national record and left her rivals trailing in her wake with Belarussian Nadzeya Ostapchuk more than a metre behind with a best throw of 20.05m to take silver while the United States' Jillian Camarena-Williams was third .03m back.
Adams had begun the final sluggishly, her opening efforts of 19.37m and a no-throw in the second round, had her sitting in sixth place before her third throw of 20.04m gave her the lead. She extended her advantage over the 13-strong field with her fourth effort of 20.72m.
A no-throw in the fifth round mattered little as, throwing last in the final round with the gold medal safely secured, she blew away the field with her sixth throw, going out past the 21-metre mark for the first time this season.
Her previous best, and national record of 21.07m was well and truly eclipsed as she became just the fifth woman to win three world championship titles. Lisovskaya's world record stands at 22.63m.
"I've been training really hard," said Adams, who won the 2007 title in Osaka and the 2009 crown in Berlin.
"I've been working hard on my technique. It's the matter of putting it all together. I didn't have anything to lose so I put everything in.
"What gave me the kick for the last attempt? I knew that I had 21 metres in me and I had to get it out. I simply smashed it!
"I'm really happy. Today's results just showed how much work I've put in this year."
The Olympic and Commonwealth champion is just the second three-time winner in the event, matching the record of German great Astrid Kumbernuss.
Her winning margin of 1.19m was the widest in the history of the event and was the longest throw outdoors for 11 years.
