Depends how you define ‘inflation’. If you think it’s rising prices then changes in supply and/or demand can change it without money printing. If you think it’s CPI then it can be changed on a whim of a government bureaucrat.  If you think it’s ’inflation of the money supply’ then it can only be changed by money printing. 

 You’re right, Inflation has always generally been the increase in the prices of goods and services of an economy… if we add an adjective, we're talking about something more specific 

 Yes it can be an argument over definitions. Taking your description as a general increase in prices, if bitcoin is increasing in purchasing power faster than prices I’d call that a fix or solution. 

 For a very short time