駅えき馬ばMeanings1nounpost horse; relay horsearchaicArchaic term for horses used in the post-station (駅制) relay system of old Japan. Not used in modern contexts.江え戸ど時じ代だい、駅えき馬ばは宿しゅく場ば間かんの連れん絡らくに欠かかせなかった。In the Edo period, post horses were essential for communication between post stations.