separation

noun

• 1the action or state of moving or being moved apart:the damage that might arise from the separation of parents and children
• the state in which a husband and wife remain married but live apart:legal grounds for divorce or separation she and her husband have agreed to a trial separationSee also legal separation (sense 1).

• 2the division of something into constituent or distinct elements:prose structured into short sentences with meaningful separation into paragraphs
• the process of distinguishing between two or more things:religion involved the separation of the sacred and the profane the constitution imposed a clear separation between church and state
• the process of sorting and then extracting or removing a specified substance for use or rejection.
• short for color separation.
• (also stereo separation) distinction or difference between the signals carried by the two channels of a stereophonic system.
• Physics & Aeronautics the generation of a turbulent boundary layer between the surface of a body and a moving fluid, or between two fluids moving at different speeds.