Spacing refers to the space between the notes. When the top three notes of a chord are as near as possible, as in the left two examples, the spacing is described as "close position" or "close harmony".

The second two examples illustrate a more restricted definition that requires all the notes to be within an interval of a 12th. When the notes are spread, as in the last two chords, it is called "open position" or "open harmony".

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