'nondeductible' definitions:

Definition of 'nondeductible'

(from WordNet)
adjective
Not allowable as a deduction [ant: deductible]

Definition of 'nondeductible'

From: GCIDE
  • nondeductible \nondeductible\ adj. not allowable as a tax deduction; as, political contributions are nondeductible. Opposite of deductible. [WordNet 1.5]