Understandable · Level AAA · Introduced in WCAG 2.0
WCAG 3.1.3: Unusual Words
Published by whatisADA / Grow Wild Agency · Updated
What this criterion means
At Level AAA, provide a way to identify specific meanings of unusual or restricted words, including jargon and idioms. A short explanation where the term first matters is often the most useful route.
A practical example
A service guide tells users to “reconcile the account.” Explain what reconcile means in this process and link to a relevant definition, rather than assuming the user understands accounting terminology.
How to check it
- Review the page for specialized terms, idioms and ordinary words used with a restricted meaning.
- Find a definition mechanism that supplies the intended meaning in this context.
- Check that the mechanism is accessible by keyboard and assistive technology and does not require understanding more unexplained jargon.
What can be missed
A general dictionary entry may not explain the product's specific meaning. Tooltips that cannot be reached or dismissed can create an additional barrier while trying to explain the word.
Record your test
Use this worksheet to record what you actually checked. Notes stay on this device when you choose Save; they are not sent to us. Avoid personal or confidential information on shared devices.
These are your observations, not automated results or a conformance certificate. A complete evaluation needs appropriate scope, supported technologies, all applicable criteria and relevant page states.
Primary sources and scope
This is independent implementation guidance with original examples. The linked standard contains the full definitions, exceptions and conformance requirements. A criterion or checklist alone does not establish legal applicability or whole-site conformance.