1Having no train as a part, attached, or following, without a train.
2Having no railway train or trains; where no trains are running.
Mid 17th century (in an earlier sense). From train + -less.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。