1. A degree in a continuum of size or quantity
   "an explosion of a low order of magnitude";
   - order
    
2. A number assigned to the ratio of two quantities; two quantities are of the same order of magnitude if one is less than 10 times as large as the other; the number of magnitudes that the quantities differ is specified to within a power of 10
   "The difference between 1,000 and 5,000 is within one order of magnitude";
   - magnitude

Derived forms: orders of magnitude

Type of: magnitude, ratio

Encyclopedia: Order of magnitude