The region that is inside of something.

synonym: interior.

Roget 190: contents; cargo, lading, freight, shipment, load, bale, burden, jag; cartload^†, shipload; cup of, basket of, etc. (receptacle) 191 of; inside etc. 221; stuffing, ullage.    ... show more

Roget 221: interiority; inside, interior; interspace^†, subsoil, substratum; intrados.    contents etc. 190; substance, pith, marrow; backbone etc. (center) 222; heart, bosom, breast; abdomen; vitals, viscera, entrails, bowels, belly, intestines, guts, chitterings^†, womb, lap; penetralia [Lat.], recesses, innermost recesses; cave etc. (concavity) 252.    ... show more

Dutch: binnenkant, binnenste, binnenwerk, inwendige
Polish: wnętrze, środek

The inner or enclosed surface of something.

synonym: interior.

Dutch: binnenkant, binnenzijde
Polish: spód

Relating to or being on the side closer to the center or within a defined space.

Being or applying to the inside of a building.

Confined to an exclusive group:
— Inside information.

synonyms: inner, privileged.

Roget 221: interior, internal; inner, inside, inward, intraregarding^†; inmost, innermost; deep seated, gut; intestine, intestinal; inland; subcutaneous; abdominal, coeliac, endomorphic [Physio.]; interstitial etc. (interjacent) 228^†; inwrought etc. (intrinsic) 5; inclosed etc. v.. home, domestic, indoor, intramural, vernacular; endemic.    ... show more

Away from the outer edge.

Within a building:
— In winter we play inside.

synonym: indoors.

On the inside:
— Inside, the car is a mess.

synonym: within.

With respect to private feelings.

synonym: inwardly.

In reality.

synonyms: at bottom, at heart, deep down, in spite of appearance.