Definition of delfs:
(n) :
(education) Diplôme d'étude de langue française, a French-language qualification.
(n) :
(heraldry) A charge representing a square sod of turf, traditionally taking the form of a simple square (e.g. in the middle of an escutcheon), although modernly sometimes represented with the grass in profile.
(n) :
(archaic, UK, dialectal) A mine, quarry, pit dug; ditch.
(n) :
Alternative form of delft (“style of earthenware”). [A delf; a mine, quarry, pit or ditch.]