To "adhere" means to:

The term "adhere" means to hold fast or stick together, which reflects the concept of maintaining a close relationship or connection. In various contexts, such as in materials science, it can refer to the ability of substances to cling to one another. For example, adhesives are designed to cause two surfaces to stick together, showcasing the essence of adhesion.

This understanding is crucial in disciplines like biology, where cells may adhere to one another to form tissues, or in psychology, where the adherence to principles might influence behavior. Recognizing this definition helps in grasping how adherence plays a significant role in different fields and applications.