S: (adj) callable (subject to a demand for payment before due date) "callable bonds"
S: (adj) collect, cod (payable by the recipient on delivery) "a collect call"; "the letter came collect"; "a COD parcel"
S: (adj) collectible, collectable, payable (subject to or requiring payment especially as specified) "a collectible bill"; "a note payable on demand"; "a check payable to John Doe"
S: (adj) delinquent, overdue (past due; not paid at the scheduled time) "an overdue installment"; "a delinquent account"
S: (adj) due (scheduled to arrive) "the train is due in 15 minutes"
S: (adj) due (suitable to or expected in the circumstances) "all due respect"; "due cause to honor them"; "a long due promotion"; "in due course"; "due esteem"; "exercising due care"
S: (adj) ascribable, due, imputable, referable (capable of being assigned or credited to) "punctuation errors ascribable to careless proofreading"; "the cancellation of the concert was due to the rain"; "the oversight was not imputable to him"
Adverb
S: (adv) due (directly or exactly; straight) "went due North"