also: そとづら
noun
outer surface; outside; exterior
Physical outer surface or exterior of an object.
この箱の外面はとても滑らかだ。
The outer surface of this box is very smooth.
noun
outward appearance; external appearance
How something looks from the outside, often contrasting with inner reality.
彼は外面は穏やかだが、実は短気だ。
He appears calm on the outside, but he's actually short-tempered.
noun
manner with others; demeanor; outward bearing
Only with reading そとづら
Specifically read そとづら. Refers to one's behavior or attitude shown to others, often with a nuance of putting on a front.
彼は外面がいいから、初対面の人には好かれる。
He has a good manner with others, so people he meets for the first time like him.