daydream
/ˈdeɪdriːm ˈडेड्रीम्/ noun [C] thoughts that are not connected with what you are doing; often pleasant scenes in your imagination दिवास्वप्न, वास्तविकता से कटे हुए विचार; काल्पनिक आनंद
The child stared out of the window, lost in a daydream.