When you go outside on a pleasant day, you may feel thrilled to breathe the air and enjoy the freshness of nature.
Likewise, when something is a breath of fresh airyou receive the same excited feeling from being around it as you do when you step outside into a fresh breeze. When something freasg a breath of fresh airyou enjoy it greatly. It is new, thrilling, and invigorating to you.
This idiom comes from two idioms widely used before the s. The two idioms from where is originates are breath of heaven and breath of springboth of which mean the same thing. Those two phrases have not been widely used since mids, when a breath of fresh air first came into use.
Sometimes, breath of spring is still used today. First, people often use this phrase to describe their joy when they are in a great mood.
For example, someone might say. Second, people use this phrase to describe the need for something new when in a bad situation.
Someone in a stifling conversation might say. In this example, the person is saying that the conversation is stale and unpleasant, and they need to find something new to.
This use shows that the chorus is missing something and would benefit from a person with a new and unique voice.