Dim-out refers to the reduction or partial blocking of light. There are several synonyms for dim-out that can be used in place of this word. Some of these synonyms include darkening, shading, screening, covering, and obscuring. Darkening refers to the process of making something less bright. Shading and screening refer to blocking light with a physical barrier such as a curtain or screen. Covering and obscuring involve completely or partially hiding an object from view. All of these synonyms can be used to describe the process of dimming out or blocking light in different contexts such as in theater productions, military operations, or in homes and offices.