1.PrepositionCaused by; resulting from; because of.
"Rising unemployment due to the economic downturn is spreading.; The carrier will be held financially responsible for any damage due to reckless handling.; Due to the rising cost of ingredients, the company decided to change the recipe. [disjunctive use, sometimes proscribed]"
2.PrepositionUsed other than figuratively or idiomatically: see due, to.
"The steamship was due to arrive in the Port of New York tomorrow."
3.Preposition(of a proof) from, written by
"The proof we provide is a nice indirect proof due to Euclid."