Normality and shared sets concerning differential polynomial are studied. Let k≥2 be a positive integer

and let

F

be a family of meromorphic functions defined in

D

all of whose zeros have multiplicity at least k

and let a

b and c be complex numbers such that a≠b

c≠0. If for each pair of functions f

g∈F

f and g share c

L(f)and L(g)share the set S={a

b}in

D

then F is normal in

D

.