(grammar) An infinitive with one or more modifiers inserted between the to and the verb.

plural of split infinitive

(programming) Any recursion that continues without end.

(grammar) To produce a split infinitive.

(mathematical analysis) Any expression that represents the addition a countably infinite number of ordered summands, often explicitly indexed by the positive or nonnegative integers.

(set theory, of a set) That is both countable and infinite; having the same cardinality as the set of natural numbers; formally, such that a bijection exists from ℕ to the set.

(logic) A regress into an infinite sequence of propositions in an attempt to found the truth of the proposition Pᵢ on the truth of the proposition Pᵢ₊₁.

(grammar) The use of the "to" infinitive form of a verb in answer to the implied question "why?".

plural of infinite recursion

(programming) A loop which continues indefinitely.