Meaning

noun an isolated fact that is considered separately from the whole

noun a small part that can be considered separately from the whole

noun extended treatment of particulars

originBorrowed from Middle French détail, from Old French detail, from detaillier, from de- + taillier (“to cut”). Compare typologically Bulgarian подробност (podrobnost), Czech podrobnost, Russian подро́бность (podróbnostʹ) (akin to дроби́ть (drobítʹ)).

Etymology from Wiktionary, CC BY-SA 3.0