1. 消除误会：Be in the air 将要发生的事情 | Clear the air 消除误会 | Cost an arm and a leg 极其昂贵

2. 清除误会;清除隔阂：clean hands. 清正廉洁 | clear the air 清除误会;清除隔阂 | cold comfort 不起作用的安慰

3. 使空气流通：clear text 明码电文 | clear the air 使空气流通 | clear the atmosphere 消除误会

4. 使空气流通, 使空气变得新鲜 澄清事实; 消除误解：beat the air (拳击)打空; 白费力气, 徒劳 | clear the air 使空气流通, 使空气变得新鲜 澄清事实; 消除误解 | disappear into thin air 不知去向, 消失得无影无踪

verb

1. dispel differences or negative emotions

[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;e.g. The group called a meeting to finally clear the air