clustering

1. A grouping of a number of similar things.

   a grouping of a number of similar things

2. The grouping of a population based on ethnicity, economics or religion.

3. The undesirable contiguous grouping of elements in a hash table.

4. A prewriting technique consisting of writing ideas down on a sheet of paper around a central idea within a circle, with the related ideas radially joined to the circle using rays.

regular