What is Lord ?
Lord is (noun) 1. a man who has a high social rank He was born a lord. Powerful lords forced King John to sign the Magna Carta. 2. the title for certain peers Lord Smith 3. an expression of surprise or shock Good lord! I didn’t realise it was so late! (verb) to lord it over someone to treat someone like a servant She lords it over the junior staff in the office.
source: Easier English, Student Dictionary Upper Intermediate Level