Does reverse biasing hold any meaning in case if both terminals are n type semiconductors?
A BJT has two PN junctions:


The Emitter-Base Junction or Emitter junction.
The Collector-Base Junction or Collector junction.


So you can say something like "Emitter junction is forward biased" or "collector junction is reverse biased". You can not say that the collector-emitter circuit is reverse biased since there is no 'collector-emitter' junction.