a.

1. 寂寞的；孤单的
   She was lonesome while her husband was away on business.

   当丈夫因事外出时，她感到孤单寂寞。

2. 人迹稀少的，荒凉的
   She walked in fear on the lonesome road.

   她在一条人迹稀少的路上走着，心里很害怕。

3. 想念的，思念的[F][（+for）]
   He was lonesome for his family when he was abroad.

   他在海外时很思念他的家。

n.

1. 【口】自己，本人[U]
   He is sitting home all by his lonesome.

   他独自一人坐在家里。

adj.