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TOEFL IELTS BNC: 7986 COCA: 17470

invalid

1 invalid /ɪnˈvæləd/ adjective
1 invalid
/ɪnˈvæləd/
adjective
Learner's definition of INVALID
: not valid无效的: such as
: having no force or effect无效力的;作废的
: not based on truth or fact : not logical or correct无事实根据的;不合逻辑的;错误的
2 invalid /ˈɪnvələd/ Brit /ˈɪnvəˌliːd/ noun
plural invalids
2 invalid
/ˈɪnvələd/ Brit /ˈɪnvəˌliːd/
noun
plural invalids
Learner's definition of INVALID
[count]
: a person who needs to be cared for because of injury or illness伤残者;(不能自理的)病人
often used before another noun常用于另一名词前
3 invalid /ˈɪnvələd/ Brit /ˈɪnvəˌliːd/ verb
invalids; invalided; invaliding
3 invalid
/ˈɪnvələd/ Brit /ˈɪnvəˌliːd/
verb
invalids; invalided; invaliding
Learner's definition of INVALID
[+ object] British
: to release (someone) from active military service because of illness or injury(因伤病)令…退役usually used as (be) invalided通常用作(be) invalided
TOEFL IELTS BNC: 7986 COCA: 17470

invalid

1 of 4

adjective (1)

in·​val·​id (ˌ)in-ˈva-ləd How to pronounce invalid (audio)
: not valid:
a
: being without foundation or force in fact, truth, or law
an invalid assumption
declared the will invalid
b
: logically inconsequent
invalidly adverb

invalid

2 of 4

noun

in·​va·​lid ˈin-və-ləd How to pronounce invalid (audio)
 British usually  -ˌlēd
: one who is sickly or disabled

invalid

3 of 4

verb

in·​va·​lid ˈin-və-ləd How to pronounce invalid (audio)
-ˌlid,
 British usually  -ˌlēd,
 or  ˌin-və-ˈlēd
invalided; invaliding; invalids

transitive verb

1
: to remove from active duty by reason of sickness or disability
2
: to make sickly or disabled

invalid

4 of 4

adjective (2)

in·​va·​lid ˈin-və-ləd How to pronounce invalid (audio)
 British usually  -ˌlēd
1
: affected by disease or disability : sickly
2
: of, relating to, or suited to one that is sick
an invalid chair

Example Sentences

Noun Her husband has become an invalid.

Word History

Etymology

Adjective (1)

Latin invalidus weak, from in- + validus strong — more at valid

Adjective (2)

Latin & French; French invalide, from Latin invalidus

First Known Use

Adjective (1)

1542, in the meaning defined above

Noun

1701, in the meaning defined above

Verb

1787, in the meaning defined at sense 1

Adjective (2)

1642, in the meaning defined at sense 1

Time Traveler
The first known use of invalid was in 1542
TOEFL IELTS BNC: 7986 COCA: 17470
invalid

adjective

ADVERB | VERBS ADVERBscientifically, statistically, technically科學上/統計學上/技術上無效VERBSbe無效become變得無效make sth, render sth使⋯無效This action would render the agreement invalid.這一行動會導致協議無效。consider sth, declare sth, deem sth認為⋯/宣佈⋯/認定⋯無效The contract was declared invalid.合同被宣佈無效。

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