Definition of maegashira in US English:

maegashira

(also maegasira)

noun

Sumo
  • Originally: the highest rank of wrestler included in the opening section of a sumo tournament; (in later use) the lower rank of wrestler within the Makunouchi division; a member of this rank.

Origin

Late 19th century. From Japanese maegashira from mahe- (now mae-) front, first part (in mae-zumō opening section of sumo performance) + -gashira, combining form of kashira head, top (part), leader.