Longman Dictionary of Contemporary English
Wiktionary
prep. caused by; resulting from.
WordNet
adj. (usually followed by `to') able to be 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"; "decide to which of these motives such extraordinary scenes are referable"- Charles Dickens [syn: ascribable(p), due to(p), imputable(p), referable(p)]
Usage examples of "due to".
It had gotten dark early, in part due to the heavy overcast, and the chill, damp air, though windless, had gotten colder yet.
Any merchant found charging one price to a native and a higher price to a soldier-provided, of course, that the price difference wasn't due to the soldier being a poor hand at haggling-was brought up before his own fellow merchants and fined four times the difference in the price, half of which went to the Merchant's Guild, one quarter to the Imperial coffers, and one quarter to the fellow who was cheated.
It was possible that his faint was due to brushing up against such protections.