Air is one of the traditional four elements, which also include earth, fire and water.
In a dream, air can represent the intellectual, emotional or spiritual side of something, in contrast with the physical, material side.
Air can also be a symbol of freedom.
A dream that you are outside in the fresh air can mean that you are enjoying a feeling of freedom, or alternatively, that you are feeling trapped and want to be free.
Dreaming that you are in a stuffy room, or that you are suffocating, can symbolize a need for more freedom.
A dream that someone is choking you can mean that someone is preventing you from expressing yourself.
Clear, fresh air can symbolize clarity of thought, while polluted or smoggy air can represent muddled or unclear thinking.
Traditionally, a dream about air means that you will have an enjoyable trip, or that you will find money that you have lost.