0 inside a container, place, or area, or surrounded or closed off by something: --
US Is Erika still in school (= does she still go to school)?
My daughter's in hospital ( US in the hospital) having her tonsils out.
I never know what's going on in her head (= what she's thinking about).
He's always looking at himself in the mirror (= at the image of his face produced by the mirror).
They used to live in Paris, but now they're somewhere in Austria.
I've got a pain in my back.
How much is that coat on display in the window (= in the space behind the window of the shop)?
1 into something: --
3 during part or all of a period of time: --
I have breakfast at 7.30, lunch at 1.00, and sometimes a snack in between.
I haven't had a decent night's sleep in years/ages (= for a long time).
She was a brilliant gymnast in her youth (= when she was young).
Life in the 19th century was very different from what it is now.
We're going to Italy in April.
4 needing or using no more time than a particular amount of time: --
5 before or at the end of a particular period: --
Have you filled in the application form for your passport yet?
You can claim back the overpaid tax by filling in this form.
Is the tide coming in or going out?