due

Definition 1

Owed at present. It is often used to denote that a deadline for a payment is at hand. For example, a mortgage payment may be due on the first of every month.

Definition 2

Because of; under the circumstances. Used most often as the phrase "due to" to explain why something happened based on previous events or circumstances. An airline company, for example, may use the term by saying "Due to severe weather conditions, all flights out of Seattle have been grounded until further notice."