Definition of "cluster" []

• A group of the same or similar elements gathered or occurring closely together; a bunch: "She held out her hand, a small tight cluster of fingers” ( Anne Tyler). (noun)
• Linguistics Two or more successive consonants in a word, as cl and st in the word cluster. (noun)
• A group of academic courses in a related area. (noun)
• To gather or grow into bunches. (verb-intransitive)
• To cause to grow or form into bunches. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Typically the collection of nodes maybe known as a cluster (though the term cluster is often misused)"
• "For some people, parallel computing and the need for a cluster is a way of life."
• "There are words or terms for such a thing already: chaos, anarchy or something else that begins with the word "cluster" and ends in an expletive that I can't really say in writing."