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1. Oxford American Dictionary

   density

   • IPA[ˈdensədē]

   美式

   • n.
     the degree of compactness of a substance；a measure of the amount of information on a storage medium (tape or disk). For magnetic tape it is the amount of information recorded per unit length of tape (bits per inch or millimeter); for a disk, a fixed number of bits per sector, sectors per track, and tracks per disk

   • noun: density, plural noun: densities

2. • 釋義

   n.

   名詞

   • 1. the degree of compactness of a substance a reduction in bone density
   • ▪ a measure of the amount of information on a storage medium (tape or disk). For magnetic tape it is the amount of information recorded per unit length of tape (bits per inch or millimeter); for a disk, a fixed number of bits per sector, sectors per track, and tracks per disk chip density doubles every eighteen months a low-density 5.25-inch floppy disk
   • ▪ degree of consistency measured by the quantity of mass per unit volume.
   • ▪ the opacity of a photographic image.
   • ▪ the quantity of people or things in a given area or space areas of low population density a density of 10,000 per square mile