Definitions of breath:

• noun:   the process of taking in and expelling air during breathing

  Example: "He took a deep breath and dived into the pool"

• noun:   a slight movement of the air

  Example: "There wasn't a breath of air in the room"

• noun:   the air that is inhaled and exhaled in respiration

  Example: "His sour breath offended her"

• noun:   a short respite
• noun:   an indirect suggestion

  Example: "Not a breath of scandal ever touched her"

• name:  A surname (very rare: popularity rank in the U.S.: #74664)