[ sahn-sey, sahn-sey ]
/ ˈsɑn seɪ, sɑnˈseɪ /
a grandchild of Japanese immigrants to the U.S. or Canada.
Origin of Sansei
1940–45; < Japanese: third generation, earlier san-seĩ < Middle Chinese, equivalent to Chinese sān three + ·shēng birth
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
"American born of nisei parents; third-generation Japanese-American," 1945, from Japanese san "three, third" + sei "generation."
Online Etymology Dictionary, © 2010 Douglas Harper