n.

1. 抽出空氣
   A slight deflation of the tires can increase their traction.

   將輪胎放一點氣可以增加它的摩擦力。

2. 通貨緊縮
   The downfall of oil price may result in a deflation.

   油價大跌的結果可能造成通貨緊縮。

n.

1. the action or process of deflating or being deflated.
2. Economics  reduction of the general level of prices in an economy.
3. Geology  the removal of particles of rock, sand, etc. by the wind.