Availability

nounverified·updated May 9, 2026

GlossaryL1 — what DictionaryL2 — how used ThesaurusL3 — relations Universaleverything

Ensuring timely and reliable access to and use of information. [20]

NIST SP 800-172r3

Senses

11 more senses beyond the canonical

SANS Glossary of Security Terms

Availability is the need to ensure that the business purpose of the system can be met and that it is accessible to those who need to use it.

National Initiative for Cybersecurity Careers and Studies (NICCS) Cybersecurity Lexiconextended definition available

The property of being accessible and usable upon demand.

ISACA Cybersecurity Glossary

Ensuring timely and reliable access to and use of information

CPMI-IOSCO Guidance on Cyber Resilience for Financial Market Infrastructures

The property of being accessible and usable as expected upon demand.

Federal Financial Institutions Examination Council (FFIEC) IT Examination Handbook Infobase, Glossary

Whether or how often a system is available for use by its intended users. Because downtime is usually costly, availability is an integral component of security.

NISTIR 7298: Glossary of Key Information Security Terms, Revision 2

Ensuring timely and reliable access to and use of information.

NISTIR 7298: Glossary of Key Information Security Terms, Revision 2sense 2 pending review

The property of being accessible and useable upon demand by an authorized entity.

ISO/IEC TS 5723:2022(en) Trustworthiness — Vocabulary

property of being accessible and usable on demand by an authorized entity

Sp 800-66 rev. 1. an introductory resource guide for implementing the health insurance portability and accountability act (hipaa) security rule

The property that data or information is accessible and usable upon demand by an authorized person.

Wordset Dictionary

the quality of being at hand when needed

NIST SP 800-171r3glossary

Ensuring timely and reliable access to and use of information. [79]

Classifications

per-axis with provenance

Entity Type

Requirement85%llm-generatedllm:claude-haiku-4-5

?unassignedlast reviewed —

Sensitivity

unclassified

Information Class

unclassified

Variants

4 surface forms

synonym: accessibility
plural: Availabilities
possessive: Availability's
pluralpossessive: Availabilities'

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