transitive verb

1. to place in order; marshal (troops for battle, etc.)
2. to dress in fine or showy attire; deck out

Etymology: ME arraien < OFr areer < ML *arredare, to put in order < L ad-, to + Gmc *raid-: for IE base see ride

noun

1. an orderly grouping or arrangement, esp. of troops
2. troops in order; military force
3. an impressive display of assembled persons or things
4. fine clothes; finery
5. Comput. a group of two or more logically related elements, identified by a single name and usually stored in consecutive storage locations in main memory
6. Math., Statistics a systematic arrangement of numbers or symbols in rows and columns