2.NounA data structure in Lisp that is a pair of pointers, car and cdr, used mainly for lists.
3.VerbTo obtain a list from a cons or a nesting of conses; to prepend an element to a list by forming a cons of that element and the list; to obtain a list from a smaller one by repeated application of such kind of prepending.
4.Verbthird-person singular simple present indicative of con