Lord is a title used to refer to a person who has power and authority over others, especially in a feudal system.
In modern usage, Lord can refer to:
1. A male peer in the British nobility (e.g. Lord Byron)
2. A respectful title for certain high-ranking officials (e.g. Lord Mayor)
3. In Christianity, a title for God or Jesus Christ (e.g. the Lord's Prayer)
4. Slang term meaning "boss" or "master" (e.g. "Yes, my lord")