Lord BrE AmE noun [singular]
1 .
a) a title of God or Jesus Christ, used when praying:
Thank you, Lord, for your blessings.
b) the Lord God or Jesus Christ, used when talking about God:
The Lord helps and guides us.
2 . Lord (only) knows spoken
a) used when you do not know the answer to something
Lord knows how/who/where etc
Lord knows how old she is now.
b) used to emphasize that something is true:
Lord only knows I tried my best to get this right.
3 . (Good) Lord!/Oh Lord! spoken said when you are suddenly surprised, annoyed, or worried about something SYN heavens :
Good Lord! Is that the time?
4 . the title of someone who has a particular type of official job in Britain:
Lord Mayor of London
5 . the Lords British English the House of Lords ⇨ the Commons
6 . Our Lord a phrase meaning Jesus Christ