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1. Oxford American Dictionary

   order of magnitude

   • IPA[ˌôrdər əv ˈmaɡnəˌto͞od]

   美式

   • n.
     a class in a system of classification determined by size, each class being a number of times (usually ten) greater or smaller than the one before；relative size, quantity, quality, etc.

   • noun: order of magnitude, plural noun: orders of magnitude

2. • 釋義

   n.

   名詞

   • 1. a class in a system of classification determined by size, each class being a number of times (usually ten) greater or smaller than the one before values might be compared by order of magnitude, a staple in making ballpark estimates
   • ▪ relative size, quantity, quality, etc. the new problems were of a different order of magnitude
   • ▪ the arrangement of a number of items determined by their relative size the items are arranged in ascending order of magnitude