A sequence is an ordered list of numbers or objects that follow a specific pattern or rule. Each element in the sequence is called a term, and the position of each term is important. For example, in the sequence 1, 2, 3, 4, 5, each number increases by one, demonstrating a simple arithmetic pattern. Sequences can be finite, having a limited number of terms, or infinite, continuing indefinitely. They are commonly used in mathematics, computer science, and various fields to analyze patterns and predict future values. Examples of sequences include Fibonacci numbers and geometric sequences.