menace menace /ˈmɛnɪs/

noun

1. () Something that is a source of danger  ( menace , threat )
   something that is a source of danger
    Earthquakes are a constant threat in Japan
   earthquakes are a constant threat in Japan
   
2. () A threat or the act of threatening  ( menace )
   a threat or the act of threatening
    He spoke with desperate menace
   he spoke with desperate menace
   

verb

1. () Express a threat either by an utterance or a gesture  ( menace )
   express a threat either by an utterance or a gesture
    He menaced the bank manager with a stick
   he menaced the bank manager with a stick
   
2. () Pose a threat to; present a danger to  ( jeopardise [British] , peril , imperil , endanger , jeopardize , menace , threaten )
   pose a threat to; present a danger to
    The pollution is endangering the crops
   The pollution is endangering the crops
   
3. Act in a threatening manner  ( menace )
   act in a threatening manner
    A menacing person
   A menacing person