1.enclosed in a container or space; used for saying that someone or something is in a room or building, especially when you are outside; within an area or country; on the inner side of something; in the inner part of something
2.into a building; into an enclosed container or empty space
3.within an organization or group; only known by people who belong to a particular organization or group
4.in someone’s mind, but not always shown or expressed
5.already drunk or eaten; used for talking about a feeling that you have in your stomach
6.done in less than a particular amount of time
7.spending time in a prison