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Definition of invalid verb from the Oxford Advanced Learner's Dictionary

invalid

verb
 
/ˈɪnvəlɪd/
 
/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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  1. 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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adverb
 
 
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