n (countable) A group of religiousadherents, especially monks or nuns, set apart within their religion by adherence to a particular rule or set of principles; as, the Jesuit Order.
n (countable) A society of knights; as, the Order of the Garter, the Order of the Bath.
n (countable) A decoration, awarded by a government, a dynastic house, or a religious body to an individual, usually for distinguished service to a nation or to humanity.
n (context|countable|biology|taxonomy) A rank in the classification of organisms, below class and above family; a taxon at that rank