Abstract
We aim to investigate and study vector-valued multiplier spaces with reference to the sequences of continuous linear operators among normed spaces and deferred Norlund summability. Further, we obtain some characterization of completeness of the spaces with respect to the vector valued null multiplier convergent operator series. Furthermore, we investigate the continuity and compactness of the summing operator S from our newly defined multiplier spaces. Finally, as an application point of view, we study a version of Orlicz-Pettis theorem by using deferred Norlund summability.