Definitions of presence:

• noun:   the act of being present
• noun:   the impression that something is present

  Example: "He felt the presence of an evil force"

• noun:   the immediate proximity of someone or something

  Example: "She blushed in his presence"

• noun:   an invisible spiritual being felt to be nearby
• noun:   the state of being present; current existence

  Example: "He tested for the presence of radon"

• noun:   dignified manner or conduct