Definition of Rai Sahib in English:
Rai Sahib
noun ˌrʌɪ ˈsɑːbˌrʌɪ ˈsɑː(h)ɪb
An honorific title awarded in British India and the Republic of India.
Origin
Early 20th century; earliest use found in Geographical Journal. From Hindi rāy sāhab, honorific title awarded in British India from rāy + sāhab.