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What (who) is exterior - definition

GIVEN A SUBSET S OF A TOPOLOGICAL SPACE X, THE BIGGEST SET OF POINTS IN S NOT PART OF THE BOUNDARY OF S

Topological interior; Exterior (topology); Interior point; Interior points; Inner point (mathematics); Inner point; Interior point of a set; Open kernel; Exterior; Interior of a set; Interior (mathematics); Exterior point

Exterior

·noun The outward surface or part of a thing; that which is external; outside.

II. Exterior ·adj Relating to foreign nations; foreign; as, the exterior relations of a state or kingdom.

III. Exterior ·noun Outward or external deportment, form, or ceremony; visible act; as, the exteriors of religion.

IV. Exterior ·adj External; outward; pertaining to that which is external;

- opposed to interior; as, the exterior part of a sphere.

V. Exterior ·adj External; on the outside; without the limits of; extrinsic; as, an object exterior to a man, opposed to what is within, or in his mind.

exterior

I. a.

1.

Outward, external, outer, out side, superficial.

2.

Extrinsic, foreign, from without.

II. n.

1.

Outside, outer part, outer surface.

2.

(Outward) appearance.

exterior

(exteriors)

1.

The exterior of something is its outside surface.

In one ad the viewer scarcely sees the car's exterior...

The exterior of the building was elegant and graceful.

= outside

N-COUNT: usu sing

2.

You can refer to someone's usual appearance or behaviour as their exterior, especially when it is very different from their real character.

According to Mandy, Pat's tough exterior hides a shy and sensitive soul.

= facade

N-COUNT: usu sing, usu with supp, oft poss N

3.

You use exterior to refer to the outside parts of something or things that are outside something.

The exterior walls were made of pre-formed concrete.

= outer, outside

ADJ: ADJ n

Wikipedia

Interior (topology)

In mathematics, specifically in topology, the interior of a subset S of a topological space X is the union of all subsets of S that are open in X. A point that is in the interior of S is an interior point of S.

The interior of S is the complement of the closure of the complement of S. In this sense interior and closure are dual notions.

The exterior of a set S is the complement of the closure of S; it consists of the points that are in neither the set nor its boundary. The interior, boundary, and exterior of a subset together partition the whole space into three blocks (or fewer when one or more of these is empty).

https://en.wikipedia.org/wiki/Interior (topology)

Examples of use of exterior

1. About 85 exterior cabins were blackened from the fire, a stark contrast to the otherwise gleaming white exterior of the ship.

2. A purely mechanical exterior was apparently harder to relate to.

3. He said work started on the exterior on Wednesday.

4. Is there anything beyond her overly made up exterior?

5. The schedules reveal the scaffolding under a savvy politician‘s exterior.