[noun][1895](linguistics) a "recent" loanword, a Japanese word that has been borrowed since the modernization of Japan during the Meiji era from a modern foreign language, especially a European one; compare 借用語(shakuyōgo, “borrowing, loanword”, refers more broadly to borrowings over roughly the past half-millenium)
(This term, がいらいご(gairaigo), is the hiragana spelling of the above term.)