Dictionary.com
Thesaurus.com
Synonyms

lost in thought

Idioms  
  1. Concentrating on or pondering over something. For example, Gwen didn't hear a word you said; she was lost in thought.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Lost in thought, Constant doesn't notice that he's no longer alone.

From Salon • Sep. 20, 2020

Lost in thought, I noticed the many potholes and bumps that riddled the country road and automatically pressed the brakes to slow down.

From Washington Post • May 21, 2018

Lost in thought, he fiddles with his fingers, rubbing his left hand with his right as though it were a kind of talisman.

From Time Magazine Archive

Lost in thought, Miss Love played a chorus of “Faith of Our Fathers, Living Still.”

From "Cold Sassy Tree" by Olive Ann Burns

Lost in thought, he did not immediately register the unnatural chill that was creeping over him, as if he were descending into fog.

From "Harry Potter and the Deathly Hallows" by J.K. Rowling