1. [noun] separating something into fine particles
    Synonyms: atomization, atomisation

  2. [noun] the disintegration of social norms governing behavior and thought and social relationships

  3. [noun] (computer science) the condition of a file that is broken up and stored in many different locations on a magnetic disk; "fragmentation slows system performance because it takes extra time to locate and assemble the parts of the fragmented file"

  4. [noun] the scattering of bomb fragments after the bomb explodes