'skyline' originates from English, combining 'sky' and 'line', where 'sky' refers to the atmosphere and 'line' refers to a boundary or outline.

'skyline' was first used in the late 19th century to describe the outline of a city or landscape against the sky.

Initially, it meant 'the line where the earth and sky appear to meet', but it evolved to include the outline of buildings or mountains against the sky.