1. (n.)stand-in a substitute for a film or television performer during the preparation of lighting, etc.
2. stand-in any substitute.
Etymology: (1930–35)
Definition of 'stand-in'
Princeton's WordNet
1. (verb)stand-in, substitute, relief, reliever, backup, backup man, fill-in someone who takes the place of another (as when things get dangerous or difficult) "the star had a stand-in for dangerous scenes"; "we need extra employees for summer fill-ins"
2. (verb)substitute, sub, stand in, fill in be a substitute "The young teacher had to substitute for the sick colleague"; "The skim milk substitutes for cream--we are on a strict diet"
Definitions of stand-in 
Afrikaans: tydelike persoon
Arabic: بَديل، إحْتِياطي
Bulgarian: дубльор
Brazilian: substituto
Czech: dubl, dvojník
German: das Double
Danish: stand-in
Greek: αντικαταστάτης
Estonian: asendaja, dublant
Farsi: جانشين
Finnish: sijainen
French: remplaçant, ante, doublur
Hebrew: מַחֲלִיף
Hindi: स्थापन्न होना
Croatian: zamjenik, dubler
Hungarian: dublőr
Indonesian: pengganti
Icelandic: staðgengill
Italian: sostituto, supplente
Japanese: 代役
Korean: 대역
Lithuanian: dubleris
Latvian: dublieris; aizvietotājs
Malay: pengganti
Dutch: vervanger
Norwegian: reserve, stedfortreder
Polish: (aktor) zastępca, zastęps
Portuguese: substituto
Romanian: suplinitor,înlocuitor
Russian: дублёр; замена
Slovak: dvojník
Slovenian: namestnik
Serbian: zamena
Swedish: stand-in, ersättare
Thai: ผู้ทำหน้าที่แทน
Turkish: vekil, yardımcı
Taiwanese: 替身
Ukrainian: заміна; дублер
Urdu: حصہ دار ہونا
Vietnamese: người đóng vai phụ, người
Chinese: 替身
