DD Definition

abbreviation
Dishonorable discharge.
American Heritage
Doctor of Divinity.
Webster's New World
Delivered.
Webster's New World
Due date.
American Heritage

The authorized but never fully implemented ccTLD for German Democratic Republic or East Germany as assigned by the IANA. .dd was replaced with .de when East Germany reunified and became part of the Federal Republic of Germany.

Wiktionary

Words Near DD in the Dictionary