Real Dictionary

-logic in American English
combining form: a combining form used in the formation of adjectives corresponding to nouns ending in -logy

logic
A particular kind of logic is the way of thinking and reasoning about things that is characteristic of a particular type of person or particular field of activity.
uncountable noun: Logic is a method of reasoning that involves a series of statements, each of which must be true if the statement before it is true.
uncountable noun: The logic of a conclusion or an argument is its quality of being correct and reasonable.

logic in American English
the science of correct reasoning; science which describes relationships among propositions in terms of implication, contradiction, contrariety, conversion, etc.
noun: the science that investigates the principles governing correct or reliable inference