/ ˈkæmiəʊ; NAmE -mioʊ/ noun ( pl. -os )
1.
a small part in a film / movie or play for a famous actor :
a cameo role / appearance
2.
a short piece of writing that gives a good description of sb/sth
3.
a piece of jewellery that consists of a raised design, often of a head, on a background of a different colour :
a cameo brooch / ring
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WORD ORIGIN
late Middle English : from Old French camahieu , cama(h)u ; later influenced by Italian cam(m)eo , from medieval Latin cammaeus , related to the Old French word.