adj. Mentally ill to such an extent that involuntary institutionalization is appropriate; crazy.
n. A crazy person.
the GNU version of the Collaborative International Dictionary of English
adj. presenting symptoms of mental illness sufficient for legal commitment to a mental institution.
adj. capable of being guaranteed or certified: a certifiable fact.
The Century Dictionary and Cyclopedia
Capable of being certified or attested: as, certifiable results.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. fit to be certified as insane (and treated accordingly)
adj. capable of being guaranteed or certified
Word Usage
"My bank statements showed, consistently, deposits every month that exceeded the required $1000 minimum, but the only "certifiable" deposit was SS, which was $8 short."