Definition of detailed adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. DETAILED definition: 1. giving a lot of information with many details: 2. giving a lot of information with many…. Learn more. The meaning of DETAILED is marked by abundant detail or by thoroughness in treating small items or parts. How to use detailed in a sentence. Synonym Discussion of Detailed. A detailed report or plan contains a lot of details. Yesterday's letter contains a detailed account of the decisions. I started drawing up more detailed budgets. DETAILED definition: having many details. See examples of detailed used in a sentence. Military to appoint or assign for some particular duty: We were detailed to patrol the border. to provide with intricate, finely wrought decoration: lingerie detailed with lace and embroidery. · detailed (comparative more detailed, superlative most detailed) Characterized by attention to detail and thoroughness of treatment. highly detailed detailed report detailed …