means A state in which things are arranged correctly or methodically; a command or instruction; or a request for goods or services to be supplied.

from From Latin 'ordo, ordinis' — a row, a rank, a series, originally the threads laid out in a weaver's loom before the weaving begins. That image runs deep: order as the careful arrangement that has to come before the pattern. It reached English through Old French 'ordre,' and from the same Latin root we get 'ordinary' (according to the usual arrangement), 'ordain' (to set in rank), and 'coordinate.' The many modern senses — neatness, a military command, a restaurant order, a religious order, a sequence — all fan out from that one idea of things put deliberately in their proper places.