logic in WordNet English dictionary

1. the branch of philosophy that analyzes inference
   logic 
   
2. a system of reasoning
   logic  logical system  system of logic 
   
3. reasoned and reasonable judgment
   "it made a certain kind of logic"
   logic 
   
4. the principles that guide reasoning within a given field or situation
   "economic logic requires it"; "by the logic of war"
   logic 
   
5. the system of operations performed by a computer that underlies the machine's representation of logical operations
   logic