What is Non-association?

Non-association definition and meaning on Dictionary terms:
an organization of people with a common purpose and having a formal structure.
the act of associating or state of being associated.
friendship; companionship: Their close association did not last long.
connection or combination.
the connection or relation of ideas, feelings, sensations, etc.; correlation of elements of perception, reasoning, or the like.
an idea, image, feeling, etc., suggested by or connected with something other than itself; an accompanying thought, emotion, or the like; an overtone or connotation: My associations with that painting are of springlike days.

Ecology. a group of plants of one or more species living together under uniform environmental conditions and having a uniform and distinctive aspect.
Chemistry. a weak form of chemical bonding involving aggregation of molecules of the same compound.
touch football.
Astronomy. stellar association.