invalid

adjective

/ɪnˈvælɪd/

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not legally or officially acceptable
- The treaty was declared invalid because it had not been ratified.
- People with invalid papers are deported to another country.
- This action would render the agreement invalid.
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
- an invalid argument
Oxford Collocations Dictionary
adverb
- scientifically
- statistically
- technically
- …
verbs
- be
- become
- make something
- …
See full entry
(computing) of a type that the computer cannot recognize
- An error code will be displayed if any invalid information has been entered.
- invalid characters
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
- He was invalided out of the army in 1943.
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.

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