fall in
verb1
To collapse inwards.
- The heavy rain caused the roof to fall in.
2
Government, Military, Politics, War Of a soldier, to get into position in a rank.
- His men resumed their muskets and fell in.1860 December – 1861 August, Charles Dickens, chapter V, in Great Expectations […], volume I, London: Chapman and Hall, […], published October 1861, →OCLC, page 68:
3
Government, Military, Politics, War To take a position.
- At that point, the Subaru fell in behind the Toyota.
4
To come to an end; to terminate; to lapse.
- On the death of Mr. B., the annuity, which he had so long received, fell in.
5
To become operative.
- The reversion, to which he had been nominated twenty years before, fell in.1841, Thomas Macaulay, Lord Byron and The Comic Dramatists of the Restoration:
- Derived terms
- fall-in, falling in
- Related terms
- fall in age, fall in flesh, fall in for, fall in hand to, fall in hand with, fall in line, fall in love, fall in love with, fall in mold, fall in mould, fall in one's road, fall in one's way, fall in somebody's heart, fall in someone's heart, fall in somebody's mind, fall in someone's mind, fall into one's hands, fall in two, fall in upon, fall in with