A more thorough explanation:

Definition: A knight is a person who, in the Middle Ages, was of noble birth and trained in arms and chivalry. They were bound to follow a superior lord into battle. In modern Britain, a man can be bestowed an honorary knighthood by the monarch as a reward for personal merit. This status no longer relates to birth or possessions and does not involve military service.

• In medieval times, knights were expected to be skilled in combat and follow their lord into battle. They were often heavily armored and rode horses.
• Today, individuals who have made significant contributions to their field or community may be knighted by the British monarch. For example, Sir Elton John was knighted for his contributions to music and charity work.

The examples illustrate how the term "knight" has evolved over time. In the past, being a knight was a hereditary status that came with certain obligations. Today, knighthood is an honorary title that recognizes an individual's achievements and contributions.