Interior

In·te′ri·or (ĭn·tē′rĭ·ẽr), a. [L., compar. fr. inter between: cf. F. intérieur. See Inter-, and cf. Intimate.]

1. Being within any limits, inclosure, or substance; inside; internal; inner; — opposed to exterior, or superficial; as, the interior apartments of a house; the interior surface of a hollow ball.

2. Remote from the limits, frontier, or shore; inland; as, the interior parts of a region or country.

Interior angle (Geom.), an angle formed between two sides, within any rectilinear figure, as a polygon, or between two parallel lines by these lines and another intersecting them; — called also internal angle. — Interior planets (Astron.), those planets within the orbit of the earth. — Interior screw, a screw cut on an interior surface, as in a nut; a female screw.

Syn. — Internal; inside; inner; inland; inward.

In·te′ri·or, n. 1. That which is within; the internal or inner part of a thing; the inside.

2. The inland part of a country, state, or kingdom.

Department of the Interior, that department of the government of the United States which has charge of pensions, patents, public lands and surveys, the Indians, education, etc.; that department of the government of a country which is specially charged with the internal affairs of that country; the home department. — Secretary of the Interior, the cabinet officer who, in the United States, is at the head of the Department of the Interior.