the act or state of adhering; state of being adhered or united

the adhesion of parts united by growth.

steady or devoted attachment, support, etc.; adherence.

assent; concurrence.

Physics . the molecular force of attraction in the area of contact between unlike bodies that acts to hold them together. Compare cohesion ( def. 2 ) .

Pathology .

the abnormal union of adjacent tissues.

the tissue involved.

Botany . the union of normally separate parts.

Railroads .

the frictional resistance of rails to the tendency of driving wheels to slip.

factor of adhesion.

noun

adherence , adhesiveness , attachment , bond , cling , grip , stickiness , stickingnotes:adherence is mostly used in figurative senses while adhesion is literal and implies physical contact between surfaces and has a technical sense in medicine , cohesion