Contingent
Webster's Dictionary [1]
(1): (n.) An event which may or may not happen; that which is unforeseen, undetermined, or dependent on something future; a contingency.
(2): (n.) That which falls to one in a division or apportionment among a number; a suitable share; proportion; esp., a quota of troops.
(3): (a.) Possible, or liable, but not certain, to occur; incidental; casual.
(4): (a.) Dependent on that which is undetermined or unknown; as, the success of his undertaking is contingent upon events which he can not control.
(5): (a.) Dependent for effect on something that may or may not occur; as, a contingent estate.
Charles Buck Theological Dictionary [2]
Any thing that happens without a fore-known cause; commonly called accidental. An event not come to pass is said to be contingent, which either may or may not be: what is already done, is said to have been contingent, if it might or might not have been. What is contingent or casual to us is not so with God. As effects stand related to a second cause, they are many times contingent; but as they stand related to the first cause, they are acts of God's counsel, and directed by his wisdom.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [3]
happening without a foreknown cause, commonly called accidental. An event not come to pass is said to be contingent, which either may or may not be; what is already done is said to have been contingent, if it might or might not have been. What is contingent or casual to us is not so with God. As effects stand related to a second cause, they are oftentimes contingent; but as they stand related to the first cause, they are acts of God's counsel, and directed by his wisdom. (See Necessity); (See Will).