Definition of "Due" :
noun: that which is deserved or owed
"Give the devil his due."
noun: a payment that is due (e.g., as the price of membership)
"The society dropped him for non-payment of dues."
adjective: owed and payable immediately or on demand
"Payment is due."
adjective: suitable to or expected in the circumstances
"All due respect."
adjective: capable of being assigned or credited to
"The cancellation of the concert was due to the rain."
adjective: scheduled to arrive
"The train is due in 15 minutes."
adverb: directly or exactly; straight
"Went due North."