Definitions for "Hashtable"
a data structure that provides couple of major improvements when compared with others, like linked list, or basic array
a lookup structure which aims to make finding a particular item more efficient
an associative array, one whose elements are indexed by a key value rather than by an ordinal index
Keywords:  beast, sense, sequence, kind, treat
a completely different kind of beast from a sequence, so it makes no sense to treat it in the same way as a sequence
Keywords:  poor, sorting, structure
a poor structure for sorting
a data construct that stores a set of items
a programming object/construct so you must being using a programming language