DJIA Share definition Flag The Dow Jones Industrial Average. The average consists of 30 of the largest and most widely held public companies in the United States. After McDonald's got sued, the DJIA took a major dive. I hope it ruined those Wall Street fat-cats. DJIA by SlashLogo March 19, 2006 0 0 Get merch Get the DJIA mug. Buy Now — $32.95 See more merch