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In this work, we propose a meta-modelling technique to nuclear matter on thebasis of a relativistic density functional with density-dependent couplings.Identical density dependence for the couplings both in the isoscalar andisovector sectors is employed. We vary the coupling parameters of the model tocapture the uncertainties of the empirical nuclear matter parameters atsaturation. Then, we construct a large ensemble of unified equations of statein a consistent manner both for clusterized and uniform matter in$\beta$-equilibrium at zero temperature. Finally, we calculate neutron starproperties to check the consistency with astrophysical observations within aBayesian framework. Out of the different sets of astrophysical data employed,constraint on tidal deformability from the GW170817 event was found to be themost stringent in the posteriors of different neutron star properties exploredin the present study. We demonstrate in detail the impact of the isovectorincompressibility ($K_{sym}$) on high-density matter that leads to aconsiderable variation in the composition of neutron star matter. A couple ofselected models with extreme values of $K_{sym}$, which satisfy various modernnuclear physics and neutron star astrophysics constraints, are uploaded in the\textsc{CompOSE} \cite{Typel:2013rza} database for use by the community.

Generalised description of Neutron Star matter with nucleonic Relativistic Density Functional