invalid Synonyms
Another word for invalid
• adjective (Context 1)
Legally or officially unacceptable, null, or without binding force, often because a formal requirement or expiration date has not been met.
"The border officer informed him that his passport was void because it had expired the previous month."
• adjective (Context 2)
Not logically sound, true, or well-founded because of flawed reasoning or false premises.
"The researchers concluded that the original hypothesis was fallacious after new experimental data contradicted its core assumptions."
• noun (Context 3)
A person made weak or disabled by a prolonged illness or injury, requiring ongoing care.
"In the novel, the protagonist spends her summers reading aloud to her elderly aunt, who had lived as an patient for decades."
• adjective (Context 4)
Suffering from or intended for people with chronic illness, weakness, or disability.
"During the nineteenth century, wealthy families often traveled to coastal resorts for the benefit of infirm relatives."
• verb (Context 5)
To remove someone from active military service or employment because of illness or injury.
"After contracting a severe tropical fever abroad, the young officer was invalided home to recover."
Opposites of invalid
The opposite of invalid shifts depending on context. Common opposites include: