定速 ていそく Meanings Noun constant speed; fixed speed Kanji 定 fix. Read as テイ. 速 speed. Read as ソク. Words containing 定速 法定速度 (ほうていそくど) default legal speed limit (in Japan, 60 km/h for cars on ordinary roads, 100 km/h on highways) Jinuma: Japanese Dictionary · Word lists