a.

1. 深思的，沉思的
   That put us all in a thoughtful mood.

   這使我們大家陷入了沉思。

2. 富有思想的；經認真推敲的
3. 細心的，注意的[F][（+of）]
   You should be more thoughtful of your behavior.

   你應該更加注意你的舉止。

4. 體貼的，考慮周到的[（+about/of）]
   She is always thoughtful of her mother.

   她總是很體貼她的母親。

adj.

1. absorbed in or involving thought.
   ▸showing careful consideration or attention.
2. showing regard for other people.