Webster's Revised Unabridged Dictionary · 1913

Joust

Joust (joust or just; 277) , intransitive verb

[Old English justen, jousten, Old French jouster, jouster, joster, French jouter, from Latin juxta near to, nigh, from the root of jungere to join. See Join, and compare Jostle.]

1.
To engage in mock combat on horseback, as two knights in the lists; to tilt.
For the whole army to joust and tourney. — Holland
2.
To engage in a competition involving one-to-one struggle with an opponent.

Joust , noun

[Old English juste, jouste, Old French juste, jouste, joste, French joute. See Joust, v. i.]

1.
A tilting match; a mock combat on horseback between two knights in the lists or inclosed field.
Gorgeous knights at joust and tournament. — Milton
2.
Any competition involving one-to-one struggle with an opponent.