"Caught up" refers to a feeling of being entangled in or absorbed by something. Synonyms for "caught up" include engrossed, absorbed, immersed, fixated, captivated, and preoccupied. These words describe someone who is highly focused or mentally occupied with one thing, taking all their attention and thoughts. When you are caught up in something, it's like being in a bubble, where nothing else seems to matter except the present activity. For instance, you could be caught up in a thrilling book, a challenging puzzle, or even a heated debate. Regardless of what captures your attention, being caught up in something can be both enriching and time-consuming.