Legion/ˈliːdʒən/ Definition 1 of 3Pro Tip 1/3Common Hyperbole Often used to exaggerate the number of items or people, not always literally countless. There were legion reasons why he couldn’t come. Pro Tip 2/3Abstract Concept Can abstractly represent an overwhelming number of inanimate concepts. There's a legion of issues with the current plan. Pro Tip 3/3Potential Negative May imply problems or challenges due to the vast number, not just neutral abundance. A legion of technical faults appeared overnight.