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fell in; fallen in; falling in; falls in
Definition of fall in
1 : to sink inward
the roof fell in
2 : to take one's proper place in a military formation
fall in with
1 : to concur with
had to fall in with her wishes
2 : to harmonize with
it falls in exactly with my views
3 : to begin associating with
she fell in with a bad crowd
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Time Traveler for fall in
The first known use of fall in was in 1719
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