in 1 so as to be contained inside something or surrounded by it: She opened the cupboard and put the tins in. | He picked up a glass and poured some water in. 2 inside a building, especially the building where you live or work: I'm afraid Mr Stewart won't be in until tomorrow morning. | She's never in when I call. | We're staying in this evening. 3 if a train, boat, or plane is in, it has arrived at a station, airport etc: Our train's not in yet. | When's her flight due in? 4 if you send something in, you send it to an organization, where it will be dealt with: All entries must be in by next week. | Letters have been pouring in from all over the country. 5 if you write, paint, or draw something in, you add it: Fill in your name and address on the form provided. | The information is typed in by trained keyboarders. 6 if clothes, colours etc are in, they are fashionable: Stripes are definitely in this summer. 7 if a person or team is in, they are batting in a game such as cricket: Surrey have chosen to go in first. 8 if a ball is in during a game, it is inside the area where the game is being played: Her second serve was just in. 9 be in for sth if someone is in for something unpleasant, it is going to happen to them: I'm afraid he's in for a bit of a disappointment. 10 be in for it informal if someone is in for it, they are going to be punished: We're really in for it now. 11 be/get in on sth to be involved in something that is happening: I think you ought to be in on this discussion, Ted. 12 have (got) it in for sb informal if someone has got it in for you, they do not like you and want to cause problems or difficulties for you: I think the teacher's really got it in for me. 13 if something falls or turns in, it falls or turns towards the centre: The map had started to curl in at the edges. 14 if a boat or the tide comes in, it comes towards the shore: The tide was coming in. | The boat drifted in to the shore. 15 be in with sb informal to be friendly with someone: She's in with the theatrical crowd. 16 be in at sth to be present when something happens: I was lucky enough to be in at the start of the research project home