Definition: All actions directly applied to a single and stable item aimed at facilitating its appreciation, understanding and use. These actions are only carried out when the item has lost part of its significance or function through past alteration or deterioration. They are based on respect for the original material. Most often such actions modify the appearance of the item. Examples of restoration are retouching a painting, reassembling a broken sculpture, reshaping a basket, filling losses on a glass vessel.
(ref. ICOM-CC document 'Terminology to characterize the conservation of tangible cultural heritage', prepared for ICOM-CC meeting in New Delhi, 2008).