Contiguity

--Definition== A state in which two or more physical objects are physically touching one another or in which sections of a plane border on one another.

Context

The philosopher Aristotle came up with the three basic Laws of Association: law of contiguity, law of similarity, and law of contrast. The Law of Contiguity states that we associate things that occur close to each other in time or space.

In physics, contiguity refers to the principle of locality which states that an object is influenced directly only by its immediate surroundings Principle of locality - Wikipedia

https://en.wikipedia.org/wiki/Principle_of_locality

The continuity principle or continuity equation is another principle of fluid mechanics that states that what flows into a defined volume in a defined time, minus what flows out of that volume in that time, must accumulate in that volume Continuity principle | physics | Britannica

https://www.britannica.com/science/continuity-principle