[*** \mathrm{luster}^1] |ˈləstər| (British lustre)

source: By Unknown photographer (Rijksmuseum) - https://www.europeana.eu/portal/en/record/90402/BK_1983_253_C.html, CC0

1. a gentle sheen or soft glow, especially that of a partly reflective surface:

〖具体例ではa ～〗 (表面の)光沢, つや(gloss, sheen); 輝き, 光.

e.g. the luster of the Milky Way

e.g. she couldn't eat and her hair lost its luster.

the manner in which the surface of a mineral reflects light.

glory or distinction:

輝かしい名声, 光栄; 輝く美しさ, 光彩

e.g. a celebrity player to add luster to the lineup.

2. a thin coating containing unoxidized metal which gives an iridescent glaze to ceramics.

(陶磁器に金属光沢を出す)上薬

ceramics with an iridescent metallic glaze; lusterware:

ラスター〘金属光沢をもった陶磁器〙

e.g. as modifier : luster jugs.

3. a fabric or yarn with a sheen or gloss:

ラスター〘光沢のある羊毛と綿の混紡〙

e.g. as modifier : luster yarn.

British a thin dress material with a cotton warp, woolen weft, and a glossy surface.

4. a prismatic glass pendant on a chandelier or other ornament:

(シャンデリアの)下飾り

e.g. a chandelier dripping with glass lusters.

a cut-glass chandelier or candelabra.

(下飾りの付いた)シャンデリア

early 16th century: from French, from Italian lustro, from the verb lustrare, from Latin lustrare ‘illuminate’.

[*** \mathrm{luster}^2] |ˈləstər| (British lustre)

another term for lustrum.