Noun

(commonalities)

The common people; the commonalty

The joint possession of a set of attributes or characteristics.

*1969 , "Second life for war widows", Time , 25 Jun 1969:

*:Zunin sold the idea to his military superiors in the fearful jargon of his profession: "In a situation where commonality of loss of the husband is present, the group can be exceedingly supportive."

Such a shared attribute or characteristic

(telecommunication) A quality that applies to materiel or systems: (a) possessing like and interchangeable parts or characteristics enabling each to be utilized, or operated and maintained in common; (b) having interchangeable repair parts and/or components; (c) applying to consumable items interchangeably equivalent without adjustment.

* 2003 , , transcript of radio communication,

KLING: FYI I've just lost four separate temperature transducers on the left side of the vehicle, hydraulic return temperatures. (pause) Two of them on system one and one in each of systems 2 and 3.

CAIN: Four hyd return temps?

KLING: To the left outboard and left inboard elevons.

CAIN: OK, is there anything common to them, DSC or MDM or anything? I mean, you're telling me you lost them all at exactly the same time?

KLING: No, not exactly. They were within probably four or five seconds of each other.

CAIN: OK, where are those? Where is that instrumentation located?

KLING: All four of them are located in the aft part of the left wing, right in front of the elevons, elevon actuators. And there is no commonality .

CAIN: No commonality .

*:(long pause)

Noun

(uncountable) Oneness; the state or fact of being one undivided entity.

* 1846 ,

If any literary work is too long to be read at one sitting, we must be content to dispense with the immensely important effect derivable from unity of impression - for, if two sittings be required, the affairs of the world interfere, and everything like totality is at once destroyed.

* {{quote-news

, year=2011 , date=October 1 , author=Saj Chowdhury , title=Wolverhampton 1 - 2 Newcastle , work=BBC Sport citation , page= , passage=Alan Pardew's current squad has been put together with a relatively low budget but the resolve and unity within the team is priceless.}}

A single undivided thing, seen as complete in itself.

* 1999 , Joyce Crick, translating Sigmund Freud, The Interpretation of Dreams , Oxford 2008, p. 137:

If a single day has brought us two or more experiences suitable to initiate a dream, the dream will unite references to them both into a single whole; it obeys a compulsion to form a unity out of them .

(drama) Any of the three classical rules of drama (unity of action, unity of place, and unity of time).`

(mathematics) Any element of a set or field that behaves under a given operation as the number 1 behaves under multiplication.

(legal) The peculiar characteristics of an estate held by several in joint tenancy.