Old words: omnibus and cotillion

Hannibal History: A cotillion party was planned at the Marion House on Hannibal's Market Street in 1858. In an article found via chroniclingamerica.org, Oscar

Schmidt, proprietor, had arranged for an omnibus to bring party guests from downtown to his west end boarding house.

So what is an omnibus? Wikipedia.org offers an appropriate definition:

Omnibus is an old term for a horse-drawn enclosed bus, being the Latin for 'for all'.

Merriam-Webster defines cotillion as: a large formal party for dancing