Definition of ppi abbreviation from the Oxford Advanced Learner's Dictionary

 

ppi

 abbreviation
abbreviation
BrE BrE//ˌpiː piː ˈaɪ//
 
; NAmE NAmE//ˌpiː piː ˈaɪ//
 
(computing)
 
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pixels per inch (a measure of the quality of images)
See the Oxford Advanced American Dictionary entry: ppi