Invalid

Pronunciation: /ɪnˈvælɪd/

Definitions of invalid

noun a person made weak or disabled by illness or injury

Example Sentences

A1 An invalid can't be used to access the building.

A2 The doctor declared the document invalid due to missing information.

B1 She was denied entry because her ID was deemed invalid.

B2 The contract was declared invalid by the court.

C1 The judge ruled the evidence presented was invalid.

C2 The scientist's theory was proven invalid after further research.

adjective not valid or acceptable according to established standards or rules

Example Sentences

A1 The doctor said my prescription was invalid.

A2 The student's excuse for missing class was deemed invalid.

B1 The contract was declared invalid due to a technicality.

B2 The evidence presented in court was found to be invalid.

C1 The argument put forward by the opposition was deemed invalid by experts.

C2 The scientific theory was proven invalid after further research.

Examples of invalid in a Sentence

formal The contract was deemed invalid due to a technicality in the wording.

informal You can't use that coupon, it's invalid now.

slang That excuse is totally invalid, bro.

figurative Her argument was so weak, it was like an invalid point in a debate.

Grammatical Forms of invalid

• past tense: invalidated
• plural: invalids
• comparative: more invalid
• superlative: most invalid
• present tense: invalidates
• future tense: will invalidate
• perfect tense: has invalidated
• continuous tense: is invalidating
• singular: invalid
• positive degree: valid
• infinitive: invalidate
• gerund: invalidating
• participle: invalidated

Origin and Evolution of invalid

First Known Use: 1601 year

Language of Origin: Latin

Story behind the word: The word 'invalid' originated from the Latin word 'invalidus' which means weak or disabled.

Evolution of the word: Originally used to describe someone who is physically weak or disabled, the word 'invalid' has evolved to also refer to something that is not legally binding or acceptable, as well as an error in reasoning or logic.