mum
1. mum \'m*m\ aj [prob. imit. of a sound made with closed lips] : SILENT {keep ~} - often used interjectionally 2. mum vt or mummed; or mum.ming [ME mommen, fr. MF momer to go masked] 1: to act or play usu. in mask or disguise 2: to go about merrymaking in disguise during festivals 3. mum n [G mumme] : a strong ale or beer 4. mum n : CHRYSANTHEMUM