in

inpreposition

American /ɪn/ British /ɪn/

In places something inside a space or a period of time, or shows the condition, the clothing, or the manner something is in.

  1. inside an area or spaceinside a place, area, container, or other enclosed space

    • The keys are in my bag.
    • They live in a small town.
    • There's milk in the fridge.
    • She's in the kitchen.

    Collocations

    preposition + noun in the bag, in the room, in town

    Synonyms inside

    Compare at (in names an area with edges around it, such as a room or a city; at names an exact point, such as an address); into (in shows position already inside; into shows movement toward the inside); within

  2. within a period of timeduring or within a particular period of time, such as a month, year, or season

    With a length of time such as five minutes, in can also mean "when that time has passed": I'll be back in five minutes means after five minutes.

    • We got married in June.
    • The book is set in the 1800s.
    • I'll be back in five minutes.
    • It rarely snows in spring here.

    Compare on (in is for longer periods, such as months, years, and seasons; on is for days and dates; at is for a precise clock time)

  3. wearingwearing a particular piece of clothing or color

  4. a state or conditionwithin a particular state, condition, or situation

    Collocations

    phrase in trouble, in a hurry, in good condition, in debt
  5. arranged asusing a particular shape, group, or manner

Common mistakes

I was born at 1990. I was born in 1990.
Use in for a year, month, or season, not at.
The information is in the internet. The information is on the internet.
Some fixed phrases use on, not in: on the internet, on the radio, on TV.