Merriam-Webster Collegiate Dictionary - orderly

 I. adjective  Date: 1570  1.  a.  (1) arranged or disposed in some order or pattern ; regular ~ rows of houses  (2) marked by order ; tidy keeps an ~ desk  b. governed by law ; regulated an ~ universe  c. methodical an ~ mind  2. well behaved ; peaceful an ~ crowd  • ~ adverb  II. noun  (plural -lies)  Date: 1781  1. a soldier assigned to perform various services (as carrying messages) for a superior officer  2. a hospital attendant who does routine or heavy work (as cleaning, carrying supplies, or moving patients)