hush up v 1: cover up a misdemeanor, fault, or error; "Let's not whitewash the crimes of Stalin"; "She tried to gloss over her mistakes" [syn: {whitewash}, {gloss over}, {sleek over}] 2: cause to be quiet or not talk; "Please silence the children in the church!" [syn: {hush}, {quieten}, {silence}, {still}, {shut up}] [ant: {louden}]