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(also zoner) A person intoxicated with narcotics, esp habitually so; space cadet (1960s+ Narcotics)verb
To be inattentive; be hazily preoccupied: He zoned so bad he didn't even hear the teacher call his name/ I was kind of zonin', checking things out (1980s+)
[fr ozone, ''a very high level of the atmosphere'']