Dictionary definition · con
noun
- an argument opposed to a proposal
- a person serving a sentence in a jail or prison
- a swindle in which you cheat at gambling or persuade a person to buy worthless property
verb
- deprive of by deceit"He swindled me out of my inheritance"
- commit to memory; learn by heart"Have you memorized your lines for the play yet?"
adverb
- in opposition to a proposition, opinion, etc."much was written pro and con"
Source: Open English WordNet (CC BY 4.0).