1 rare To make red, to redden; specifically to cause the skin or another part of the body to turn red. Also without object.
2Geology Soil Science
To alter (a sediment, deposit, etc.) by rubefaction. Usually in passive.
Late Middle English (in an earlier sense). From Middle French rubifier (French rubéfier, †rubefier, 1611 in Cotgrave) to redden, to alter (a sediment) by rubefaction and its etymon classical Latin rubefacere from rubeus red + -facere.