Senses
大面儿上/ 大面兒上 on the surface
on the surface; in terms of general appearance; outwardly
大面儿上/ 大面兒上 in public
in public; in front of people; in a social setting where one must save face or follow etiquette
大面儿上/ 大面兒上 generally
generally speaking; on the whole
大面儿上/ 大面兒上 face
social standing or reputation; social prestige (especially in public or for the sake of appearances)