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 mean:
1. A title for a nobleman or peer in the UK
2. A respectful form of address for certain officials
3. In Christianity, a title for God or Jesus
4. Slang for someone who is very skilled at something
5. As a verb, meaning to act in a domineering manner