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Webster 1913 Edition

Invalid

In-val′id

,
Adj.
[Pref.
in-
not +
valid
: cf. F.
invalide
, L.
invalidus
infirm, weak. Cf.
Invalid
infirm.]
1.
Of no force, weight, or cogency; not valid; weak.
2.
(Law)
Having no force, effect, or efficacy; void; null;
as, an
invalid
contract or agreement
.

In′va-lid

(?; 277)
,
Noun.
[F.
invalide
,
n. & a.
, L.
invalidus
,
Adj.
See
Invalid
null.]
A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health who is unable to care for himself.

In′va-lid

,
Adj.
[See
Invalid
,
Noun.
]
Not well; feeble; infirm; sickly;
as, he had an
invalid
daughter
.

In′va-lid

,
Verb.
T.
1.
To make or render invalid or infirm.
“Invalided, bent, and almost blind.”
Dickens.
2.
To classify or enroll as an invalid.
Peace coming, he was
invalided
on half pay.
Carlyle.

Webster 1828 Edition

Invalid

INVAL'ID

,
Adj.
[L. invalidus; in and validus, strong, from valeo, to be strong, to avail.]
1.
Weak, of no force, weight or cogency.
2.
In law, having no force, effect or efficacy; void; null; as an invalid contract or agreement.

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