facet//ˈfæs.ɪt//B2Frequency Level 11NeutralNounfacetSingularfacetsPlural1One of the flat surfaces cut on a gemstone or forming the sides of a crystal.The diamond has 58 facets that reflect light beautifully.2A particular aspect or feature of something.We need to consider every facet of this problem.Synonymaspectdimensionside