DD can refer to several different things, depending on the context. Here are some possible meanings of DD based on the search results:

• Days after date: DD can be an abbreviation for "days after date".
• Demand draft: DD can also stand for "demand draft," which is a type of check that is guaranteed by the bank that issues it.
• Dishonorable discharge: In the context of military service, DD can refer to a "dishonorable discharge," which is a type of punitive discharge from the armed forces.
• Doctor of divinity: DD can also be an abbreviation for "Doctor of Divinity," which is an academic or honorary title in some religious institutions.
• Due date: DD can also stand for "due date," which is the date by which a payment or other obligation is expected to be fulfilled.
• Certificate of Release or Discharge from Active Duty: In the context of military service, DD Form 214 is a certificate of release or discharge from active duty that is issued to service members who have completed their military service.
• Developmental disability: DD can also refer to "developmental disability," which is a severe, chronic disability that affects a persons cognitive or physical functioning.

Its important to note that the meaning of DD can vary depending on the context, so its always best to clarify what is meant by the term in a particular situation.