1. A composite number is a positive integer greater than 1 that has more than two positive divisors. 2. This means a composite number can be divided evenly by numbers other than 1 and itself. 3. For example, 4 is composite because it has divisors 1, 2, and 4. 4. In contrast, a prime number has exactly two divisors: 1 and itself. 5. Therefore, composite numbers are the opposite of prime numbers in terms of divisibility.