an organization of people having a common interest; a society or league

a link in memory, thought, or imagination with a thing or person; a connotation

a room with melancholy associations

associating or being associated; specif the formation of mental connections between sensations, ideas, memories, etc

Words being arbitrary must owe their powers to association — Dr Johnson

the formation of polymers by loose chemical linkage, e.g. through hydrogen bonds

an ecological community with two or more dominant species uniformly distributed

a plant association