Definition of "mega-" []

• Large: megadose. (prefix)
• Surpassing other examples of its kind; extraordinary: megahit. (prefix)
• One million (106): megahertz. (prefix)
• 1,048,576 (220): megabyte. (prefix)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Kilo-, mega-, giga- and tera- are prefixes used with bit or byte to measure capacities."
• "And words which previously had sufficient power in themselves are attracting prefixes such as uber- or mega- in order to re-energise them, she adds."
• ""In today's market, the hated segment is the mega- buyout," said Mario Giannini, chief executive officer of Hamilton Lane Advisors, a Bala Cynwyd, Pennsylvania-based firm that advises clients on private-equity investments."