sidelight

A sidelight or sidelite in a building is a window, usually with a vertical emphasis, that flanks a door or a larger window. Sidelights are narrow, usually stationary and found immediately adjacent to doorways. While most commonly found as supporting elements emphasizing the importance of a primary entrance, sidelights may be employed at any interior or exterior door where a visual emphasis is desired, or where additional light or visibility is needed.

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