- large, great, powerful: megacephalic, megaphone
- huge in size, number, etc.: a mega-yacht
- to an enormous degree: mega-popular
- one million; the factor 10: megahertz, megaton
Origin of mega-Classical Greek mega- from megas, great, mighty: see much
- Large: megadose.
- Surpassing other examples of its kind; extraordinary: megahit.
- One million (106): megahertz.
- 1,048,576 (220): megabyte.
Origin of mega-Greek from megas great ; see meg- in Indo-European roots.
From the prefix mega-.
- (originally) Very large, great. Denoting a size larger than usual.
- In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by one million (106.) SI Symbol: M, computing abbreviation: Mi.
- (computing) Multiplying the unit to which it is attached by 220 (= 1,048,576, the binary round number closest to a million).
- (computing, marketing) Multiplying the unit to which it is attached by 210 Ã— 103 (= 1024,000, the binary round number closest to thousand).
From Ancient Greek Î¼ÎÎ³Î±Ï‚ (megas, “great, large, mighty"), from Proto-Indo-European *meÇµhâ‚‚s (“great"). Cognate with Latin magnus, and with Germanic words: Gothic ðŒ¼ðŒ¹ðŒºðŒ¹ðŒ»ðƒ (mikils), Old English micel, Middle English muchel, English much, Old High German mihhil, Old Norse mikill, Danish meget.
mega- - Computer Definition
(1) Million (10 to the 6th power). Abbreviated "M," it is a prefix for capacities and speeds (megabits, megabytes, megahertz, etc.). Mega may refer to 1,000,000 or 1,048,576, the latter based on the binary system (see NIST binary). See MB, meg, binary values and space/time.
(2) A prefix attached to common, non-computer words that means a very large size or quantity. For example, "megabucks" means a lot of money. Both "mega" and "giga" are used in this manner, although mega means million and giga means billion. See giga.