Definition: NL.js stands for "Node-Linked JavaScript." It's a library that provides a framework for building interactive web applications using Node.js, enabling developers to easily add dynamic elements like forms, tables, and charts. The specific definition could be: 1. NL.js is a JavaScript-based library used for creating responsive, interactivity-rich web applications. 2. It simplifies the process of developing interactive web pages by providing a common interface for building various types of web components. 3. This allows developers to easily integrate new features without needing to understand complex back-end technologies like React or Angular. NL.js's primary focus is on improving efficiency and performance, as it leverages a minimal API that simplifies the development process and provides better control over user interactions.