/priˈɒkjupaɪ ||; priˈɑkjəˌpaɪ/verb [T] (present participle preoccupying third person singular present preoccupies;past tense past participle preoccupied) to fill sb's mind so that he/she does not think about anything else; to worry 占据某人的思绪；使全神贯注或入神