Definition of dispersion noun from the Oxford Advanced Learner's Dictionary

 

dispersion

 noun
noun
BrE BrE//dɪˈspɜːʃn//
 
; NAmE NAmE//dɪˈspɜːrʒn//
 
[uncountable](specialist)
 
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the process by which people or things are spread over a wide area population dispersion the dispersion of light Word Origin late Middle English: from late Latin dispersio(n-), from Latin dispergere, from dis- ‘widely’ + spargere ‘scatter, strew’.
See the Oxford Advanced American Dictionary entry: dispersion