indentation Syllabification: (in·den·ta·tion)Pronunciation: /ˌindenˈtāSHən/Translate indentation | into German | into Italian Definition of indentation noun 1the action of indenting or the state of being indented:paragraphs are marked off by indentation an indentation for each change of speaker 2a deep recess or notch on the edge or surface of something:the indentation between the upper lip and the noseindentation in other Oxford dictionaries Definition of indentation in the British & World English dictionary