Definition of "non-spacing" []

• Of a character, combined with another and so not consuming additional horizontal space. (adjective)

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• "I don't have any personal data comparing spacing versus non-spacing but for me the spacing works well as a marker."
• "Stripping is an interesting job (aka On the meaning of meaningless, aka All Mn characters are non-spacing, but some are more non-spacing than others)"
• "These are characters that are either non-spacing combining marks or zero-width control characters."