1. I-adjective (keiyoushi)

   lonely (e.g. person, feeling); lonesome; forlorn

   一人で生活するのは寂しい。

2. desolate; deserted; lonely (e.g. place); isolated; solitary

3. sad

4. lacking; wanting; insufficient

   see 懐が寂しい

Also written 淋しい【さびしい】sabishii