1 way, means, procedure, approach, route, avenue, road, mode, manner, technique, process, routine, modus operandi; plan, scheme, programme, course, routine, practice, pattern, system, methodology; Colloq US M.O.:
What method was used to arrive at the answer?
2 arrangement, order, system, structure, organization, design, pattern, orderliness, neatness, regularity, discipline:
There is a discernible, underlying method to what seems superficially chaotic.