Adjective has 1 sense

• face-to-face(s = adj.all) - in each other's presence; "a face-to-face encounter"

Adverbial has 2 senses

• face-to-face(r = adv.all) - within each other's presence; "she met the president face-to-face"
• face-to-face(r = adv.all) opposite - directly facing each other; "lived all their lives in houses face-to-face across the street"; "the two photographs lay face-to-face on the table"; "they sat opposite at the table"