In software engineering, a design pattern is a general repeatable solution to a commonly occurring problem in software design. A design pattern isn't a finished design that can be transformed directly into code. It is a description or template for how to solve a problem that can be used in many different situations.
Programing paradigms are approaches to write code, each with its own principles, concepts and guidelines. These paradigms guide how developers structure and organize their programs, as well as how they think about problem-solving.
SOLID principles are one of the object-oriented approaches used in software development, intended to create quality software. The broad goal of the SOLID principles is to reduce dependencies, so that developers can change one area of the software without affecting others. Furthermore, they are intended to make designs easier to understand, maintain, reuse, and extend.