又名四階成佛。小乘佛之成道有四階：一三阿僧祇劫之萬行，二百大劫之相好業，三最後身斷下八地之惑，四坐於道場，於三十四心斷非想之惑，而成佛。大乘義章曰：「大智度中迦旃延子曰：略有四階：一者三祇，二者百劫，三者後身斷下八地，四者三十四心斷非想惑。毘曇同之，成實少異。」金光明玄義記上三曰：「婆沙翻數，此論廣說四階成佛。」四教儀集注中曰：「三祇百劫名四階成道。」
(or 四階成佛) The four Hīnayāna steps for attaining Buddhahood, i. e. the myriad deeds of the three asaṃkhyeyakalpas; the continually good karma of a hundred great kalpas; in the final body the cutting off of the illusions of the lower eight states; and the taking of one's seat on thebodhi-plot for final enlightenment, and the cutting off of the thirty-four forms of delusive thought.
一四階成道 又作四階成佛。指小乘菩薩得道成佛之四階段。(1)三祇，謂於三大阿僧祇劫修萬行。(2)百劫，謂於百劫修相好之業。(3)菩薩最後身斷盡下八地之惑，謂菩薩最後受生時，斷盡三界九地中下八地之思惑。(4)三十四心斷結成道，謂最後成道時，於八忍、八智、九無間、九解脫等三十四心，斷盡見思之惑，而後成佛。俱舍論、大毘婆沙論等常見此四階成道之說。天台宗依此判立為藏教菩薩成道之階段，然依天台四教儀集註卷中末載，係以三祇為前三階，百劫為第四階。〔金光明玄義記卷上之三〕p2290