What Does ASD Mean?

ASD means "Australian Signals Directorate" and "Autism Spectrum Disorder." Here is more information about each of these definitions of ASD.

Australian Signals Directorate

TL;DR: The Australian Signals Directorate (ASD) is Australia's national signals intelligence (SIGINT) and cybersecurity agency. Responsible for foreign signal intelligence, cybersecurity, and information warfare, ASD plays a vital role in Australia's defense.

In Detail: ASD is an Australian government agency responsible for foreign signals intelligence, cybersecurity, and information warfare. Established in 1947, ASD's mission is to collect and analyze foreign electronic communications to support national defense, security, and foreign policy objectives.

ASD is a key member of the "Five Eyes," intelligence alliance, which is made up of the SIGINT agencies of five Anglophone countries that collaborate closely and share intelligence. The other four members are:
  • Canada: Communications Security Establishment (CSE).
  • New Zealand: Government Communications Security Bureau (GCSB).
  • United Kingdom: Government Communications Headquarters (GCHQ)
  • United States: National Security Agency (NSA).
In addition to its intelligence function, ASD provides protective security advice and plays a leading role in safeguarding Australia's government and critical infrastructure from cyber threats.

Headquartered in Canberra, ASD operates under legal oversight to ensure compliance with Australian law and human rights standards.

Autism Spectrum Disorder

In healthcare, ASD means "Autism Spectrum Disorder." In this context, ASD is a complex developmental condition that affects social interaction, communication, interests, and behavior.

ASD is known as a "spectrum" disorder because individuals can present a wide range of symptoms with varying degrees of severity. Some might have difficulty with social communication, while others may have repetitive behaviors or intense interests in specific topics.

There is no single cause for ASD, and the exact combination of genetic and environmental factors is still being researched.

Image for ASD

When I write ASD, I mean this:

meaning of ASD

"Australian Signals Directorate"

Summary of Key Points for the First Definition

"Australian Signals Directorate" is the most common definition for ASD in military and government circles.
Definition:Australian Signals Directorate
Guessability:guessability level 5

5: Extremely difficult to guess

Typical Users:typical user

Summary of Key Points for the Second Definition

"Autism Spectrum Disorder" is a common definition for ASD on Snapchat, WhatsApp, Facebook, Twitter, Instagram, and TikTok.
Definition:Autism Spectrum Disorder
Guessability:guessability level 3

3: Guessable

Typical Users:typical user
Adults and Teenagers

Example of ASD Used in a Text

author logo

This page is maintained by the Cyber Definitions Editorial Team.

Help Us Improve Cyber Definitions

  • Do you disagree with something on this page?
  • Did you spot a typo?
  • Do you know a slang term that we've missed?
Please tell us using this form.


Try our fun quiz to test your knowledge of slang and texting abbreviations.
gold cup

gold cup

gold cup

  • This test has questions.
  • A correct answer is worth 5 points.
  • You can get up to 5 bonus points for a speedy answer.
  • Some questions demand more than one answer. You must get every part right.
  • Beware! Wrong answers score 0 points.
  • 🏆 If you beat one of the top 3 scores, you will be invited to apply for the Hall of Fame.
Scoring System

Cyber Guru (+)
Cyber Hero (+)
Cyber Captain (+)
Cyber Sergeant (+)
Cyber Recruit (+)