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

 

rangefinder

 noun
noun
BrE BrE//ˈreɪndʒfaɪndə(r)//
 
; NAmE NAmE//ˈreɪndʒfaɪndər//
 
 
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an instrument for estimating how far away an object is, used with a camera or gun
See the Oxford Advanced American Dictionary entry: rangefinder