invalid
in-val-id · adjective
Definitions
adjective
- 1.
Not legally or officially acceptable.
- 2.
Not based on sound reasoning; logically flawed.
- 3.
(Computing) Not conforming to required format or rules.
- 4.
As noun (pronounced /ˈɪnvəlɪd/): a person made weak or disabled by illness or injury.
Related words
Etymology
From Latin invalidus "not strong," from in- "not" + validus "strong."