obsession
- A persistent, disturbing preoccupation with an often unreasonable idea or feeling. nounHis obsession with cleanliness made it difficult for him to relax.She has an obsession with collecting vintage dolls.
- A state in which someone thinks about someone or something constantly or frequently, especially in a way that is not normal. nounHer obsession with social media began to affect her daily life.The artist's obsession with light and shadow is evident in his paintings.