English · Word Candidate

invalid

/ɪnˈvæl.ɪd/

Proposed by a contributor, not yet supported by evidence.

Also seen as: invalids · invaliding · invalided

Sense 1

Meaning · English

Not valid; not true, correct, acceptable, or appropriate.

Adjective

Examples

Your argument is invalid because it uses circular reasoning.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Sense 2

Meaning · English

Any person with a disability or illness.

NounRegister: dated

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Sense 3

Meaning · English

A person who is confined to home or bed because of illness, disability or injury; one who is too sick or weak to care for themselves.

NounRegister: dated

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Sense 4

Meaning · English

Suffering from disability or illness.

Adjective

Examples

Invalidism therefore referred to a lack of power as well as a tendency toward illness. It is for this reason that I choose to discuss the invalid woman rather than just the ill one.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Common questions

What does “invalid” mean?

Not valid; not true, correct, acceptable, or appropriate.

Is “invalid” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.