Definition: Adhesion refers to a phenomenon by which objects are bound together by bonds or interactions between molecules, atoms, or other particles. This bond can be from chemical forces like electrostatics (in case of atoms) or physical forces (like gravity or friction), and is necessary for mutual movement of the object in question. The term "adhesiveness" was first coined by German chemist Max von Laue in 1903 to describe the phenomenon where two objects stick together because one part (the adhesive surface) is attracted to another part of the other object, even though they are separated by a large distance. The concept is used when studying the bond between molecules. The adhesion is more often seen as an interaction rather than a property of the substance that binds. In chemistry and materials science, adhesiveness is usually described in terms of the force required to break the adhesion (often referred to as adhesive constant). For example, it can be defined as "the strength of binding forces between two substances or molecules due to their interaction," or "the ability to stick together." Adhesive bonding can be a result of chemical forces like electrostatics (in case of atoms), or physical forces such as gravity or friction.

adhesiveness