The acronym "NG" has multiple meanings depending on the context. Here are some of the most common meanings:

• National Guard: This is a reserve military force in the United States.
• Not Good: This is a slang term used to indicate that something is bad or undesirable.
• National Geographic: This is a magazine and media brand that focuses on geography, history, and world culture.
• Next Generation: This is a term used in many applications as a suffix, especially in Linux. For example, syslog-ng and Aircrack-ng.
• Nasogastric: This is a medical term that refers to a tube inserted through the nose into the stomach to remove stomach contents.

Other meanings of "NG" include "No Gum," "Neutral Good," "Nose Guard," and "New Game," among others.