v.1. To descend or drop freely or effortlessly into something: I was so tired that I went to my bedroom and fell into bed.
2. To come to assume a configuration, pattern, or order: The lines of text fell into neat rows. After a quick meeting, our plans fell into place.
3. To come upon, receive, or become involved with something, especially by chance: They fell into a lot of money unexpectedly, so they bought a new car.
4. To undergo a change of state or emotion, especially a negative change: I took one look at my class schedule and fell into a bad mood. The tenants complained when the apartment building fell into disrepair.