Definition of Cosmological 1. Pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe Adjective 2. Pertaining to the branch of philosophy dealing with the elements and laws and especially the characteristics of the universe such as space and time and causality Adjective Synonyms for word "cosmological" Lexical Analysis for "cosmological" cosmology the metaphysical study of the origin and nature of the universe the branch of astrophysics that studies the origin and evolution and structure of the universe cosmology the metaphysical study of the origin and nature of the universe the branch of astrophysics that studies the origin and evolution and structure of the universe etymology cosmologically etymologically related cosmology is derived from cosmological argument is derived from cosmological city is derived from cosmological constant is derived from cosmological decade is derived from cosmological horizon is derived from cosmological natural selection is derived from cosmological perturbation theory is derived from cosmological principle is derived from cosmological redshift is derived from cosmological scale is derived from cosmological term is derived from cosmological theorem