As a Noun: 1. The condition when things are neat and arranged in an orderly way. English = tidiness, orderliness, neatness. 2. Neat ordered piles of things regularly spaced. English = stacks. 3. A group or stack of things which are neat or which all share some characteristic. English = category. 4. A sequence of things placed one after another according to some kind of principle. English = order. As a Verb or Adjective: 1. To be neat and arranged in an orderly way. English = (be) tidy. 2. To put things into neat and ordered groups or regularly spaced stacks. English = order, stack up, space. 3. To be put into neat and ordered groups or regularly spaced stacks. English = (be) ordered, (be) stacked up, (be) spaced. 4. To put things into neat and ordered groups or regularly spaced stacks, usually according to some characteristic each group of things shares. English = categorise.