This word can also be a form of:
adjective “missing”
 base form missing (more/most)
- not able to be found; lost 
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 After the hike, he realized his wallet was missing.
 - not present when expected or needed 
The detective noticed a missing piece of evidence.
 
noun “missing”
 singular missing, plural missings
- (statistics) a missing value in a data set 
The software highlighted the missings for the analyst to review.