適てき者しゃ生せい存ぞんてきしゃせいぞんFreq.FrequencyTop 100,000Meanings1nounsurvival of the fittestyojijukugo (four-character idiom)›A yojijukugo used in biology, sociology, and business to describe natural selection or competitive survival.自し然ぜん界かいでは適てき者しゃ生せい存