1. [adv]  involving close contact; confronting each other; "the boy and the policeman suddenly came face-to-face at the corner"; "they spoke facel to face"
2. [adv]  within each other's presence; "she met the president face-to-face"
3. [adv]  directly facing each other; "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"
4. [adj]  in each other's presence; "a face-to-face encounter"

(F2F, irl) Used to describe personal interaction in real life as opposed to via some digital or electronic communications medium.