invalid

adjective

/ɪnˈvælɪd/

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not legally or officially acceptable（法律上或官方）不承认的；无效的
- The treaty was declared invalid because it had not been ratified.条约没有得到批准，因此被宣布无效。
- People with invalid papers are deported to another country.持无效证件的人被驱逐到别国。
- This action would render the agreement invalid.这一行动会导致协议无效。
Topics Law and justicec1
Oxford Collocations Dictionary
adverb
- scientifically
- statistically
- technically
- …
verbs
- be
- become
- make something
- …
See full entry
not based on all the facts, and therefore not correct无充分事实的；站不住脚的
- an invalid argument站不住脚的论点
Oxford Collocations Dictionary
adverb
- scientifically
- statistically
- technically
- …
verbs
- be
- become
- make something
- …
See full entry
(computing计算机) of a type that the computer cannot recognize不能识别的；无效的
- An error code will be displayed if any invalid information has been entered.输入了无效信息将显示错误代码。
- invalid characters无效字符
Topics Computersc2

opposite valid

Word Originadjective mid 16th cent. (earlier than valid): from Latin invalidus, from in- ‘not’ + validus ‘strong’ (from valere ‘be strong’).

noun

/ˈɪnvəlɪd/

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verb

/ˈɪnvəlɪd/

(British English)

Verb Forms

present simple I / you / we / they invalid	/ˈɪnvəlɪd/ /ˈɪnvəlɪd/
he / she / it invalids	/ˈɪnvəlɪdz/ /ˈɪnvəlɪdz/
past simple invalided	/ˈɪnvəlɪdɪd/ /ˈɪnvəlɪdɪd/
past participle invalided	/ˈɪnvəlɪdɪd/ /ˈɪnvəlɪdɪd/
-ing form invaliding	/ˈɪnvəlɪdɪŋ/ /ˈɪnvəlɪdɪŋ/

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invalid somebody (out) | invalid somebody (out of something) to force somebody to leave the armed forces because of an illness or injury（因伤病）令…退役
- He was invalided out of the army in 1943.他于 1943 年因伤病退役。
Word Originverb mid 17th cent. (as an adjective in the sense ‘infirm or disabled’): a special sense of invalid (adjective), with a change of pronunciation.