What is the meaning of face-to-face?

adjective

• In each other's presence.
  • usage: "a face-to-face encounter"

adverb

• Within each other's presence.
  • usage: "she met the president face-to-face"
• Directly facing each other.
  • usage: "the two photographs lay face-to-face on the table"; "lived all their lives in houses face-to-face across the street"; "they sat opposite at the table"
  • synonyms: opposite