"immersed in thought" is a correct and usable phrase in written English.
It means deeply absorbed or lost in one's thoughts or thinking deeply about something. You can use this phrase to describe someone who is completely engrossed in their thoughts and may not be aware of their surroundings. It can also be used to convey a sense of intense focus or concentration. Example: As she sat by the window, gazing out at the rain falling from the dark clouds, she was completely immersed in thought about her upcoming job interview.
"Which one is Maurice?" I'd ask, immersed in thought about my next play.
Viana was again immersed in thought, although now he had removed his foot from the water and placed it again — with the tip of the sock wet and dark — on the grass.
Talk to him, and then select the option in blue that reads "Snowysnow?" You need to talk to the Snowman a couple of times, but when he's immersed in thought about Poze, you need to find him.
There, according to state television, the Dear Leader became "immersed in thoughts while looking at the precious historic objects that contain the bodily odour of our Supreme Leader from his school years some 80 years back".
As you move from violet thought to yellow to red, you lose control over your thinking, or to put it another way you're increasingly immersed in your thoughts; eventually, these thoughts replace reality.
On this particular evening, he is seated at the bar savoring his glass of Cabernet Sauvignon, sipping slowly and deeply immersed in his thoughts.
Not long after he decided to try out a sensory deprivation tank a salt water bath where you float in the dark, silent, immersed in your own thoughts.
"It seems to be important for people to find a way to think about the breakup and their process of recovery without getting totally immersed in the negative thoughts and feelings that might result," she said.
If I blow off one of my kids or ignore them when they really need me, and I do it because I am far too immersed in my own thoughts to be present and listen, I should feel guilty about that.
When immersed in visualization or idealistic thought exchange, the life forces are invigorated to create, to make our dreams alive in the energy field around us.
However, for many of us, when it comes to our thought stream, we sit there tuned in and immersed in a toxic running commentary without changing the station.
