A Quick and Simple Dictionary

CON

1. (initialism) .  '''C'''ertificate '''o'''f '''N'''eed.
2. Proper noun.  A male given name, a diminutive form of Conor or Cornelius.
3. Verb.  (rare) To study, especially in order to gain knowledge of.
4. Verb.  (rare, archaic) To know, understand, acknowledge.
5. Noun.  A disadvantage of something, especially when contrasted with its advantages (''pros'').
6. Noun.  (slang) A convicted criminal, a convict.
7. Noun.  (slang) A fraud; something carried out with the intention of deceiving, usually for personal, often illegal, gain.
8. Verb.  (transitive, slang) To trick or defraud, usually for personal gain.
9. Verb.  (nautical) To give the necessary orders to the helmsman to steer a ship in the required direction through a channel etc. (rather than steer a compass direction).
10. Noun.  (nautical) The navigational direction of a ship.
11. Noun.  Short for convention or conference; used in regard to science fiction conventions and other types of conventions.