As you can see, our word of the day has several meanings! To ensure you use the term “stud” properly, we suggest committing these definitions to memory. What Is the Word Origin of Stud? The etymology of stud can get a little confusing with its slightly varying definitions and usages, but this guide will help walk you through its origin. The meaning of STUD is a group of animals and especially horses kept primarily for breeding. How to use stud in a sentence. A stud is a metal piece that sticks out, usually for decoration. You might have studs spelling out "Mom" on your leather jacket. Straight, simple earrings — a single pearl on a straight post, for instance — are also called studs. Learn the meaning of stud as a noun in different contexts, such as horse breeding, decoration, jewelry, boot, fastener, and tyre. See pronunciation, synonyms, and translations of stud in various languages.