Fluency refers to the ability to speak or write a language smoothly and effortlessly. It involves not just knowing vocabulary and grammar, but also being able to express thoughts clearly and quickly. Fluency is often measured by how well a person can communicate without frequent pauses or hesitations.
In addition to language, fluency can apply to other skills, such as reading or playing a musical instrument. For example, a fluent reader can understand and interpret text rapidly, while a fluent musician can play notes seamlessly. Overall, fluency indicates a high level of proficiency and comfort in a particular skill or activity.