From Old French jouster (modern French: jouter), from late popular Latin juxtare. English since the early 14th century.
joust (plural jousts)
- A tilting match: a mock combat between two mounted knights or men-at-arms using lances in the lists or enclosed field.
a mock combat between two mounted knights or men-at-arms
joust (third-person singular simple present jousts, present participle jousting, simple past and past participle jousted)
- To engage in mock combat on horseback, as two knights in the lists; to tilt.
Derived terms 
engage in mock combat on horseback