Bolt was virtually unchallenged in the race, turning in a 2013-best time of 19.66 seconds. His Jamaican countryman Warren Weir was second at 19.79 and Curtis Mitchell of the United States took the bronze medal at 20.04.
Bolt, who turns 27 Wednesday, last Sunday had another clear victory in the 100. With Saturday's 200 title in hand, he has completed the 100-200 double in the 2008 and '12 Olympics and the last three world championships.
Ethiopia's Meseret collected a medal in her fifth consecutive world championship meet when she won the women's 5,000 in 14 minutes, 50.19 seconds. Kenyan runner Mercy Cherono was second in 14:51.22 and the bronze went to Almaz Ayana, another Ethiopian, in 14:51.33.
Stephan Kiprotich, of Uganda, added the marathon world championship to his gold from the 2013 Olympics. He covered the race in 2 hours, 9 minutes, 51 seconds. Ethiopians Lelisa Desisa (2:10:12) and Tadese Told (2:10:23) finished second and third, respectively.
The Russian team of Yulia Gushchina, Tatyana Firova, Kseniya Ryzhova, and Antonina Krivoshapka claimed the gold in the women's 4x400 with a time of 3 minutes, 20.19 seconds, beating the silver-medal U.S. team by 0.12 seconds. The team from Great Britain and Northern Ireland came in third at 3:22.61.
Russia took gold in the women's high jump when Svetlana Shkolina cleared 2.03 meters (6.66 feet). Brigetta Barrett of the United State came in second at 2.00 and Ruth Beitia of Spain and Olympics gold medalist Anna Chicherova form Russia, tied for the bronze medal, making 1.97.
Brianna Rollins of the United States took gold in the 100-meter hurdles, crossing in 12.44 seconds. Australian Sally Pearson, who won the event in the 2011 worlds and last year's Olympics, was second in 12.50 with the bronze medal going to Tiffany Porter of Great Britain in 12.55.
Vitezslav Vesely of the Czech Republic won the javelin with a heave of 87.17 meters (285.99 feet), edging Finnish thrower Tero Pitkamaki, who took the silver at 87.07. Russia's Dmitri Tarabin was third at 86.23.
The golds by Shkolina and the relay team gave Russia a total of seven firsts in the world championships, the most this year. The United States is second with six gold medals. Jamaica has four.
The United States leads in overall medals with 20 (six gold, 11 silver, three bronze). Russia totals 15 medals and Kenya and Ethiopia each had 10.