The process or technique of adding an aureole or halo to a figure in art; the act of surrounding something with a circle of light.
From 'aureole' plus the gerund/present participle suffix '-ing.' This describes the actual artistic technique used to create halos around saints and holy figures.
'Aureoling' in medieval art was a technical skill—painters had to use special gilding techniques and light layers to make halos look three-dimensional and float!
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