invalid Antonyms
Opposite of 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 valid 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 valid after new experimental data contradicted its core assumptions."
• adjective (Context 3)
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 healthy relatives."
• verb (Context 4)
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."
Similar words to invalid
Words similar to invalid shift depending on context. Common synonyms include: