To or towards the inside of.
Mary danced into the house.
To or towards the region of.
The eagle flew off into the wide blue sky.
Against, especially with force or violence.
I wasn't careful, and walked into a wall
Indicates transition into another form or substance.
I carved the piece of driftwood into a sculpture of a whale.
After the start of.
About 20 minutes into the flight, the pilot reported a fire on board.
Interested in or attracted to.
My date for tonight has black hair, and I'm into that.
Expressing the operation of multiplication.
Five into three is fifteen.
Expressing the operation of division, with the denominator given first. Usually with "goes".
24 goes into 48 how many times?
Investigating the subject (of).
There have been calls for research into the pesticides that are blamed for the decline in bee populations.