Mega definitions

Large.

Megadose.

prefix
41
1
Surpassing other examples of its kind; extraordinary.

Megahit.

prefix
38
0
One million (106 ).

Megahertz.

prefix
35
0
1,048,576 (220 ).

Megabyte.

prefix
32
0
Great in size, quantity, etc., often in relation to others of its kind.
adjective
27
0
A prefix that means.
25
1
Large, great, powerful.

Megacephalic, megaphone.

affix
24
0
Large, as in megadose, a large dose.
22
1
One million; the factor 106

Megahertz, megaton.

affix
21
0
One million, as in megahertz, one million hertz.
19
0
220 (that is, 1,048,576), which is the power of 2 closest to a million, as in megabyte.
16
0
(informal) Very large.
adjective
3
0
(slang, 1990s) Great; excellent.
adjective
3
0
See M.
1
0
Huge in size, number, etc.

A mega-yacht.

affix
0
0
To an enormous degree.

Mega-popular.

affix
0
0
(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.
0
0
(originally) Very large, great. Denoting a size larger than usual.
prefix
0
0
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.
prefix
0
0
(computing) Multiplying the unit to which it is attached by 220 (= 1,048,576, the binary round number closest to a million).
prefix
0
0
(computing, marketing) Multiplying the unit to which it is attached by 210 × 103 (= 1024,000, the binary round number closest to thousand).
prefix
0
0

Origin of mega

From Ancient Greek μέγας (megas, “great, large, mighty"), from Proto-Indo-European *meǵhâ‚‚s (“great"). Cognate with Latin magnus, and with Germanic words: Gothic 𐌼𐌹𐌺𐌹𐌻𐍃 (mikils), Old English micel, Middle English muchel, English much, Old High German mihhil, Old Norse mikill, Danish meget.