fall out (plural fall outs)

1. A disagreement, parting of ways.

   We had a fall out, couldn't come to terms and haven't talked since.

fall out

1. (literally) To come out of something by falling.

   I opened the cupboard and a can fell out onto my foot.

2. (intransitive, idiomatic) To cease to be on friendly terms.

   Dave and I fell out after a long argument.

   • 1624, Democritus Junior [pseudonym; Robert Burton], “Iealousie, His Equivocations, Name, Definition, Extent, Seuerall Kindes, of Princes, Parents, Friends. In Beasts, Men, before Marriage, as Corriuals, or after, as in this Place”, in The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: Printed by John Lichfield and James Short, for Henry Cripps, OCLC 54573970 ↗, partition 3, section 3, member 1, subsection 1, pages 465–466 ↗:

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3. (military, intransitive)
   1. (literally) To leave one's place in the current formation of ranks in order to take one's place in a new formation.
   2. (figuratively) To leave one's current location to report for duty at a new location.

      The company fell out for an artillery drill.

4. (dialect, intransitive) To pass out.
5. (dated) To turn out, happen.
   • 1611, The Holy Bible, […] (King James Version), imprinted at London: By Robert Barker, […], OCLC 964384981 ↗, Exodus 1:10 ↗:

     Come on, let us deal wisely with them; lest they multiply, and it come to pass, that, when there falleth out any war, they join also unto our enemies, and fight against us, and so get them up out of the land.

   • 1866, Mark Twain, in a letter to William Bowen, 7 May 1866 ↗

     I expected to be in the States long before this, but things fell out otherwise.

• German: ausfallen, ausgehen
• Russian: выпада́ть
• Spanish: caerse

• French: brouiller
• Portuguese: brigar
• Russian: ссо́риться
• Spanish: desavenir (pronominal), desconcertar (pronominal)