Personally Identifiable Information

nounverified·updated May 9, 2026

GlossaryL1 — what DictionaryL2 — how used ThesaurusL3 — relations Universaleverything

Any information about an individual maintained by an agency, including (1) any information that can be used to distinguish or trace an individual‘s identity, such as name, social security number, date and place of birth, mother‘s maiden name, or biometric records; and (2) any other information that is linked or linkable to an individual, such as medical, educational, financial, and employment information.

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

Senses

2 more senses beyond the canonical

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

Information which can be used to distinguish or trace an individual's identity, such as their name, social security number, biometric records, etc., alone, or when combined with other personal or identifying information which is linked or linkable to a specific individual, such as date and place of birth, mother’s maiden name, etc.

NIST SP 800-171r3acronym list

PII: Personally Identifiable Information

Classifications

per-axis with provenance

Entity Type

Data92%llm-generatedllm:claude-haiku-4-5

?unassignedlast reviewed —

Sensitivity

Regulated93%llm-generatedllm:claude-haiku-4-5

?unassignedlast reviewed —

Information Class

Pii95%rule-basedr:info.pii.named.v1

?unassignedlast reviewed —

Variants

3 surface forms

acronym: PII
synonym: Personal Identification Information
possessive: Personally Identifiable Information's

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