[1] : The Collaborative International Dictionary of English v.0.48

majority leader \majority leader\ n. politics
   the leader of the majority party in a legislature. compare
   minority leader.
   wordnet 1.5
see also:
minority leader 

[2] : WordNet (r) 2.0

majority leader
     n : leader of the majority party in a legislature

[3] : Moby Thesaurus II by Grady Ward, 1.0

21 moby thesaurus words for "majority leader":
   mp, member of congress, member of parliament, alderman,
   assemblyman, chosen freeholder, city father, congressman,
   congresswoman, councilman, floor leader, lawgiver, lawmaker,
   legislator, minority leader, party whip, representative, senator,
   solon, state senator, whip

Majority Leader >> M Words
Majority Leader, definition of term: Majority Leader
majority+leader_pag1.html

Leader >> L Words
Leader, definition of term: Leader
leader_pag1.html

Majority >> M Words
Majority, definition of term: Majority
majority_pag1.html

Majority Rule >> M Words
Majority Rule, definition of term: Majority Rule
majority+rule_pag1.html

Minority Leader >> M Words
Minority Leader, definition of term: Minority Leader
minority+leader_pag1.html

Loss Leader >> L Words
Loss Leader, definition of term: Loss Leader
loss+leader_pag1.html