invalid
adjective (1)
in·val·id
| \ (ˌ)in-ˈva-ləd
\
\
Definition of invalid
(Entry 1 of 4)
: not valid:
a
: being without foundation or force in fact, truth, or law
an invalid assumption declared the will invalid
b
: logically inconsequent
invalid
adjective (2)
in·va·lid
| \ ˈin-və-ləd
, British usually -ˌlēd\
, British usually -ˌlēd\
Definition of invalid (Entry 2 of 4)
1
: suffering from disease or disability : sickly
2
: of, relating to, or suited to one that is sick
an invalid chair
invalid
noun
\ ˈin-və-ləd
, British usually -ˌlēd\
, British usually -ˌlēd\
Definition of invalid (Entry 3 of 4)
: one who is sickly or disabled
invalid
verb
in·va·lid
| \ ˈin-və-ləd
, -ˌlid, British usually -ˌlēd or ˌin-və-ˈlēd\
, -ˌlid, British usually -ˌlēd or ˌin-və-ˈlēd\
invalided;
invaliding;
invalids
Definition of invalid (Entry 4 of 4)
1
: to remove from active duty by reason of sickness or disability
2
: to make sickly or disabled
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Other Words from invalid
Adjective (1)
invalidly
\ (ˌ)in-ˈva-ləd-lē
\
adverb
\
adverb
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More Definitions for invalid
invalid
noun
English Language Learners Definition of invalid
(Entry 1 of 2)
: a person who needs to be cared for because of injury or illness
invalid
verb
English Language Learners Definition of invalid (Entry 2 of 2)
British
: to release (someone) from active military service because of illness or injury
See the full definition for invalid in the English Language Learners Dictionary
invalid
adjective
in·val·id
| \ in-ˈva-ləd
\
\
Kids Definition of invalid
(Entry 1 of 2)
: having no force or effect
invalid
noun
in·va·lid
| \ ˈin-və-ləd
\
\
Kids Definition of invalid (Entry 2 of 2)
: a person suffering from sickness or disability
invalid
adjective
in·va·lid
| \ ˈin-və-ləd, British usually -ˌlēd\
Medical Definition of invalid
(Entry 1 of 3)
1
: suffering from disease or disability : sickly
2
: of, relating to, or suited to one that is sick
an invalid chair