The purpose of this article is, first and foremost, to reiterate the meaning and the common usage of the terminologies, 'homogeneous' and 'heterogeneous' nucleation, and by doing so, apply these terminologies, in their proper context, to electrodeposition. Henceforth, in this article, the process of nuclei forming preferentially at imperfections on the surface of an electrode will be termed as 'heterogeneous' nucleation, while in the absence of such preferential sites, nucleation will be labeled as 'homogeneous'. These definitions are consistent with the conventional definitions of 'heterogeneous' and ` homogeneous' nucleation, originally used in the context of nucleation within a three-dimensional (3D) environment. Using the Classical Nucleation Theory (CNT), the free energy change required for a nucleus to be formed at an imperfection on the surface of an electrode is compared with that required for a nucleus forming on an inert homogeneous surface. (C) 2018 The Electrochemical Society.