The plural of exterior; the outer surfaces or outside parts of things, or people's outward appearances or behaviors.
From Latin exterius (comparative of exterus 'outer'). The English word exterior was borrowed from Latin and simply adds the regular plural -s.
The fascinating thing about 'exteriors' in art and literature is that they're often deceiving—a beautiful façade can hide a troubled interior, which is why this contrast fascinates storytellers.
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