noun

1. a plane forming the common boundary between two parts of matter or space
2. a point or means of interaction between two systems, disciplines, groups, etc.
3. Comput. a point or means of interaction between two or more systems, components of a computer system, or the system and a user

transitive verb, intransitive verb interfaced -·faced′, interfacing -·fac′·ing

1. to sew material (interfacing) between the outer fabric and the facing of (a collar, lapel, etc.) so as to give body or prevent stretching
2. to interact with (another system, discipline, group, etc.)