In this paper quasi-developable spaces are defined and several results are given showing the relationship between quasi-developable spaces and developable spaces. A quasi- developable space is developable if and only if it has closed sets Gδ. A metacompact space is a completely regular Moore space if and only if it is a quasi-developable p-space. The notion of completeness is also defined for a quasi-developable space. A regular metacompact space is a complete Moore space if and only if it is a complete quasi-developable space.