| Adj. | 1. | unventilated - not ventilated; "stuffy unventilated rooms"breathless, dyspneal, dyspneic, dyspnoeal, dyspnoeic - not breathing or able to breathe except with difficulty; "breathless at thought of what I had done"; "breathless from running"; "followed the match with breathless interest" ventilated - exposed to air; "a well ventilated room" | |