Max Weinreich (Yiddish: מאַקס ווײַנרײַך Maks Vaynraych; Russian: Мейер Лазаревич Вайнрайх, Meyer Lazarevich Vaynraykh; 22 April 1894, Goldingen, Russian Empire – 29 January 1969, New York City) was a Russian Jewish linguist, specializing in sociolinguistics and Yiddish, and the father of the linguist Uriel Weinreich, who edited the Modern Yiddish-English English-Yiddish Dictionary. He is known for popularising the phrase "A language is a dialect with an army and navy".