1) (to cause things, people) to be arranged in a straight line (align)

2) (usually) the letters used in writing a language, arranged in order (alphabet)

3) (an example of) the condition when events happen at the same time as if this had been arranged (coincidence)

4) to collect (information) and arranged in (a book, list, report etc) (compile)

5) a book explaining the words of a language arranged in alphabetical order (dictionary)

6) additional; beyond what is usual, expected or arranged (extra)

7) pleasingly or satisfactorily arranged (harmonious)

8) a set of lines, paths etc, arranged to make it difficult to find the centre (maze)

9) a change in the order of a set of things arranged in a group; any one such arrangement (permutation)

10) relating to a ray, rays or a radius; (of spokes in a bicycle wheel etc) arranged like rays or radii (radial)