This name is pronounced Adonai and literally means “My Lord”. Where other names are not spoken to avoid blaspheming this name is substituted so for many people of the Jewish faith it is the most common word for God and because it so frequently used it represents the dedicant’s own experience of deity in their life. It is the exoteric name (name used publicly).
There is an argument to be made that the name is plural hence the pronunciation as “Adonai” and not “Adoni”. This pluralisation may simply be honourific.
The gematria number associated with ADNI is 1 + 4 + 50 + 10 (65). This is the same number as Haycol (Palace), Halol (He shone) and Mezvazah (A door post).
This name is closely related to Adon Ha-Aretz (Lord of the Earth) and Adonai Melekh (my Lord is king).