"defiance," 1520s, verbal noun from face (v.). Meaning "action of turning the face toward" is from 1540s; that of "covering in front of a garment" is from 1560s; that of "a coating" is from 1580s; that of "front or outer part of a wall, building, etc.," is from 1823. Earliest use is as "disfiguring, defacing" (c. 1400).
