inside

• interior; interior part
located on or in the inner side; private, confidential, privileged
inward; within; in; in the house; in jail (slang)
within; in
something or someone that is inside a place, container, or object is in it or surrounded by it. preposition or adverb here but can also be used as an attributive adjective. e.g. the door had no inside bolt.
the inside of something is the part or area that its sides surround or contain. the form inside of can also be used as a preposition, especially in american english.
you have inside information about a particular situation when you are involved in it and know more about it than other people, or have been told about it by someone who is involved in it.
your insides are your internal organs, especially your stomach; an informal use.
if you say that someone has a feeling inside, you mean that they have not expressed this feeling.
on a wide road, the inside lane is the left-hand lane in countries where you drive on the left, and the right-hand lane in countries where you drive on the right.
if you do something inside a particular time, you do it before the end of that time; an informal use.
you can say that someone is inside when they are in prison; an informal use.
if something such as a piece of clothing is inside out, the inside part has been turned so that it faces outwards.