From Middle English outfallen, equivalent to out- + fall. Compare Dutch uitvallen (“to fall out, sally”), German ausfallen (“to fall out, lunge”), Swedish utfalla (“to fall out”).
Outfall (third-person singular simple present outfalls, present participle outfalling, simple past outfell, past participle outfallen)
- (transitive, obsolete) To burst forth, as upon an enemy; make a sally.
From out- + fall. Compare Dutch uitval (“outburst, sally, eruption”), German Ausfall (“falling out, sally”), Swedish utfall (“sally, issue”).
NounOutfall (plural Outfalls)
- (obsolete) A sudden eruption of troops from a fortified place; sally.
- (dialectal) A quarrel; a falling out.
- The point or place of discharge of a river, drain, culvert, sewer, etc.; mouth; embouchure.