一條沒有岔路的直道，另譯為「一道、一入道」。

漢譯阿含經辭典，莊春江編(1.4版)

ekāyana-patha, ekāyana-mārga

佛教漢梵大辭典, 平川彰 Buddhist Chinese-Sanskrit Dictionary, Akira Hirakawa

p1

一乘道 (yī shèng dào) 　( “the one and sole Vehicle and Path” ) Cf. 三乘道(sān shèng dào) ;

Dharmarakṣa: {72a10} (buddhas)皆共諮嗟 是一乘道 寂然之地 無有二上(v)

{K.53.14} eka~ yāna~

Kumārajīva: {L.9b16} 佛乘

A Digital Edition of A Glossary of Dharmarakṣa translation of the Lotus Sutra by Seishi Karashima, 1998