chairperson

CIDE DICTIONARY

chairperson, n. 

 the officer who presides at the meetings of an organization; -- same as chair{3} or chairman{1}, but used to achieve a sex-neutral register.  [WordNet 1.5]

OXFORD DICTIONARY

chairperson, n. a chairman or chairwoman (used as a neutral alternative).

ROGET THESAURUS

chairperson

Director

N director, manager, governor, rector, comptroller, superintendent, supervisor, straw boss, intendant, overseer, overlooker, supercargo, husband, inspector, visitor, ranger, surveyor, aedile, moderator, monitor, taskmaster, master, leader, ringleader, demagogue, corypheus, conductor, fugleman, precentor, bellwether, agitator, caporal, choregus, collector, file leader, flugelman, linkboy, guiding star, adviser, guide, pilot, helmsman, steersman, steermate, wire-puller, driver, whip, Jehu, charioteer, coachman, carman, cabman, postilion, vetturino, muleteer, arriero, teamster, whipper in, head, head man, head center, boss, principal, president, speaker, chair, chairman, chairwoman, chairperson, captain, superior, mayor, vice president, prime minister, premier, vizier, grand vizier, eparch, officer, functionary, minister, official, red-tapist, bureaucrat, man in office, Jack in office, office bearer, person in authority, statesman, strategist, legislator, lawgiver, politician, statist, statemonger, Minos, Draco, arbiter, boss, political dictator, board, secretary, secretary of state, Reis Effendi, vicar, steward, factor, agent, bailiff, middleman, foreman, clerk of works, landreeve, factotum, major-domo, seneschal, housekeeper, shepherd, croupier, proctor, procurator, ex officio.