A reverie is a state of deep thought or meditation that is often accompanied by a feeling of relaxation or peacefulness. There are several synonyms that can be used to describe this state of mind. One of the most popular synonyms is daydreaming, which describes the act of imagining and visualizing something pleasant or enjoyable. Another synonym for in a reverie is lost in thought, which implies that the individual is completely absorbed in their own thoughts and is not paying attention to the external world. Other synonyms for in a reverie include contemplative, ruminative, reflective, and contemplative. All these synonyms are useful in describing a state of deep thought, relaxation, and contemplation.