1. Causing someone to feel disappointed, discouraged, or less confident
The criticism was deflating to his ego.
A crítica foi desanimadora para seu ego.
2. The act of releasing air or gas from something inflated
The deflating of the balloon happened slowly.
O desinflamento do balão aconteceu lentamente.
3. Reducing the force, importance, or effect of something
Her comments were deflating to the team's morale.
Seus comentários foram desanimadores para o moral da equipe.