1 noun distinguishing featureidirdhealaitheoir c m uit's used as a discriminator for studentsúsáidtear é le hidirdhealú a dhéanamh idir mhic léinn2 noun ELECTRON type of circuit, deviceidirdhealaitheoir c m u3 noun sb guilty of discriminationshe complained about the discriminatorrinne sí gearán faoin té a rinne éagóir uirthi