Longman Dictionary of Contemporary English
The Collaborative International Dictionary
certifiable \certifiable\ adj.
-
presenting symptoms of mental illness sufficient for legal commitment to a mental institution.
Syn: certified.
capable of being guaranteed or certified: a certifiable fact.
Douglas Harper's Etymology Dictionary
1846, from certify + -able. Meaning "so deranged as to be certifiably insane" is recorded from 1912.
Wiktionary
a. 1 (context of a document English) That can, or that must be certified. 2 (context informal of a person English) mentally ill to such an extent that involuntary institutionalization is appropriate; crazy. n. (context informal English) A crazy person.
WordNet
adj. fit to be certified as insane (and treated accordingly) [syn: certified]
capable of being guaranteed or certified; "a certifiable fact"
Usage examples of "certifiable".
The VidCommTech-4 had an unsettling enthusiasm for cloud-filled skies, but as far as anyone knew it was not an arrestable offence although it might be a certifiable disorder.
And even among these hardcore certifiables there are certain people who command awed respect for the truly legendary extent of their brain damage.