con con /ˈkɑːn/

adverb

1. In opposition to a proposition, opinion, etc.  ( con )
   in opposition to a proposition, opinion, etc.
    Much was written pro and con
   much was written pro and con
   

noun

1. () An argument opposed to a proposal  ( con )
   an argument opposed to a proposal
   
2. [Informal] A swindle in which you cheat at gambling or persuade a person to buy worthless property  ( bunco [Informal, N. American] , bunco game [Informal, N. American] , bunko [Informal, N. American] , bunko game [Informal, N. American] , con [Informal] , confidence game [ N. American] , confidence trick [British] , flimflam [Informal] , hustle [Informal] , con game [Informal, N. American] , sting [Informal] , con trick [Informal, British] )
   a swindle in which you cheat at gambling or persuade a person to buy worthless property
    The unsuspecting tourist fell victim to a con game on his first day in the city.
   The unsuspecting tourist fell victim to a con game on his first day in the city.
   
   
3. [Informal] A person serving a sentence in a jail or prison  ( con [Informal] , yard bird [Informal, N. American] , yardbird [Informal, N. American] , convict , inmate )
   a person serving a sentence in a jail or prison
   

verb

1. () [Informal] Deprive of by deceit  ( bunco [Informal, N. American] , diddle [Informal] , goldbrick [Informal, N. American] , hornswoggle [Informal, N. American] , mulct , nobble [Informal, British] , rook , scam [Informal] , short-change , con [Informal] , defraud , swindle , victimize , grift [Informal, N. American] )
   deprive of by deceit
    He swindled me out of my inheritance
   He swindled me out of my inheritance
    She defrauded the customers who trusted her
   She defrauded the customers who trusted her
   
2. Commit to memory; learn by heart  ( con , memorise [British] , learn , memorize )
   commit to memory; learn by heart
    Have you memorized your lines for the play yet?
   Have you memorized your lines for the play yet?