a.

1. 单独的，独自的[Z][B]
   He formed the habit of taking long solitary walks through the streets.

   他养成了在街头长时间独自漫步的习惯。

2. 单个的，唯一的[Z][B]
3. 隐居的；孤独的；寂寞的
4. 荒凉的；偏僻的
5. 【动】非群居的[Z]
6. 【植】单生的[Z]

n.

1. 独居者；隐士[C]
2. 单独监禁[U]

adj.

1. done or existing alone.
   ▸(of a bee, wasp, etc.) not social or colonial.
2. secluded or isolated.
3. [often with neg.] single; only.
4. (of a flower or other part) borne singly.

n.

1. a recluse or hermit.
2. informal solitary confinement.