fall out verb 13noun 1forms 6 verb13 •To come out of something by falling.I opened the cupboard and a can fell out onto my foot. •To cease to be on friendly terms.Dave and I fell out after a long argument. •To leave one's place in the current formation of ranks in order to take one's place in a new formation. •To leave one's current location to report for duty at a new location.The company fell out for an artillery drill. •(dialect) To pass out. •(slang) To collapse; to pass out from intoxication. •(old-fashioned) To turn out, happen.I expected to be in the States long before this, but things fell out otherwise. — 1866 •To give way under someone.The board he was walking on fell out. •(figurative) To cause someone to slip and/or fall down.The ground fell out from under him.When she left him, his world fell out beneath him. •(slang) To be enthusiastic about something; to laugh very hard.When the band started, everybody fell out. •(slang) To be shocked by something. •(slang) To depart. •(no longer used) To fall off due to the quoins holding it in place having become wet and therefore loose. noun1 •Synonym of falling out (“rift following a disagreement or quarrel”).We had a fall out, couldn't come to terms and haven't talked since. formsfell out · fallen out · falling out · falls out · fall outs · fall-outs