Joust

v. compete in a joust; compete, fight, struggle

n. fight between knights on horseback who attempt to unseat each other with lances, tilt

Jousting is a sport that consists of competition between two mounted knights using a variety of weapons, usually in sets of three per weapon (such as tilting with a lance, blows with the battle axe, strokes with the dagger, or strokes with a sword), often as part of a tournament.Jousting was just one of a number of popular martial games in the Middle Ages referred to generically as hastiludes.Though the first recorded tournament was staged in 1066, jousting did not gain in widespread popularity until the 13th century. It maintained its status as a popular European sport until the late 16th century.
See more at Wikipedia.org...

Noun
1. a combat between two mounted knights tilting against each other with blunted lances
(synonym) tilt
(hypernym) struggle, battle
(part-holonym) tournament
Verb
1. joust against somebody in a tournament by fighting on horseback
(hypernym) fight, struggle
(hyponym) tilt
(derivation) tilt

(v. i.)
To engage in mock combat on horseback, as two knights in the lists; to tilt.
  

(v. i.)
A tilting match; a mock combat on horseback between two knights in the lists or inclosed field.
  

The charge of two knights bearing shield and lance . See also the Joust of Peace and Joust of War .