12. The system of claim 8 , wherein the semantically related term tool comprises: a memory module operative to store a set of instructions for directing a processor to access the search query memory module storing search query information and determine a plurality of search sequences, each search sequence comprising one or more search queries submitted by a common user and related to a common concept, to receive one or more seed terms, and to determine one or more terms semantically related to the received seed terms based on the determined plurality of sequences of search queries; and a processor operative to access the memory module of the semantically related term tool and execute the set of instructions.
8. A system for determining one or more semantically related terms based on sequences of search queries, the system comprising: a search query memory module storing search query information, the search query information associating at least search queries received at a search engine and a user submitting the search queries, a semantically related term tool operative to: access the search query memory module storing search query information and determine a plurality of search sequences, each search sequence comprising one or more search queries submitted by a common user and related to a common concept; create a first set of vectors representing for each search query in the search query information of the search query memory module, whether the search query is associated with each sequence of the plurality of sequences; create a second set of vectors representing for each search query in the search query information of the search query memory module, a weight associated with the search query based on the number of sequences of the plurality of sequences the search query is associated with; and determine one or more terms semantically related to the seed terms based on the first set of vectors, the second set of vectors, and at least one seed term of the received one or more seed terms; wherein to determine one or more terms semantically related to the seed terms, the semantically related term tool is further operative to determine a weighted average over each sequence of the plurality of sequences as a function of the first and second set of vectors, and the at least one seed term; and wherein the weighted average is calculated using the formula: 
 T =Sum of ( V 1*VectorSimilarity( V 2, S )), wherein V 1 *VectorSimilarity (V 2 ,S) is calculated for a number of sequences found in the search query information; V 1 is the relevant vector of the first set of vectors indicating for each search query in the search query information, whether a search query is associated with the relevant sequence; V 2 is the relevant vector of the second set of vectors including for each search query in the search query information, an entry indicating a weight of a search query associated with the sequence; and S is the seed term vector indicating for each search query in the search query information, whether the search query is one of the received seed terms.