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.

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 . in prison.

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.

Usually, insides. Informal . 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 . confidential or secret information.

an inside passenger or place in a coach, carriage, etc.

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.

Baseball . (of a pitched ball) passing between home plate and the batter

The pitch was low and inside.

inside of

Informal . within the space or period of

Our car broke down again inside of a mile.

inside out

with the inner side reversed to face the outside.

thoroughly; completely

She knew the work inside out.

noun

inner parts , internal organs , bowels , entrails , viscera , recesses , middle , center , belly , womb , heart , soul , contents , components , workings , guts * , innards *