on the inner side or part of; within:inside the circle; inside the envelope.
prior to the elapse of; within:He promised to arrive inside an hour.
adv.
in or into the inner part:Please go inside.
indoors:They play inside on rainy days.
within one's heart, reason, etc.; by true nature; basically:I know inside that he's not guilty. Inside, she's really very shy.
Slang Termsin prison.
inside of, [Informal.]within the space or period of:Our car broke down again inside of a mile.
n.
the inner or internal part; interior:the inside of the house.
the inner side or surface:the inside of the hand; He pinned the money to the inside of his jacket.
Informal TermsUsually, insides. the inner parts of the body, esp. the stomach and intestines:The coffee scalded my insides.
a select or inner circle of power, prestige, etc.:a man on the inside.
the shortest of several parallel, curving tracks or lanes; the part of an oval track closest to the inner rail:The horse came up fast on the inside.
the inward nature, mind, feelings, etc.
Slang Termsconfidential or secret information.
an inside passenger or place in a coach, carriage, etc.
Idiomsinside out:
with the inner side reversed to face the outside.
thoroughly; completely:She knew the work inside out.
adj.
situated or being on or in the inside; interior; internal:an inside seat.
acting, employed, done, or originating within a building or place:He used to work on the dock but now he has an inside job.
derived from the inner circle of those concerned in and having private knowledge of a situation:inside information.
Sport[Baseball.](of a pitched ball) passing between home plate and the batter:The pitch was low and inside.
1350–1400; Middle English; see in,side1
8.See corresponding entry in UnabridgedInside,interior both refer to the inner part or space within something. Inside is a common word, and is used with reference to things of any size, small or large:the inside of a pocket.Interior, somewhat more formal, denotes the inner part or the space or regions within; it usually suggests considerable size or extent, and sometimes a richness of decoration:the interior of a country, of the earth, of a cathedral.
8.See corresponding entry in Unabridged outside, exterior.