Definition of imperforate in US English:



  • 1Anatomy Zoology
    Lacking the normal opening; not perforated.

    ‘unicellular spores of these parasites have an imperforate wall’
    • ‘If meconium is delayed, look for meconium plug, sepsis, narcotic exposure, Hirschsprung's disease, hypothyroidism, cystic fibrosis, or imperforate anus.’
    • ‘In girls, it may reveal vaginal discharge, vaginal atresia, or imperforate hymen.’
    • ‘In typical Level 3 geometries, the shell was tightly coiled, with an imperforate umbilicus.’
    • ‘The most common associated conditions include Hirschsprung's disease and imperforate anus.’
    • ‘In the former, they are embedded within perforate extraxial skeleton, whereas in the latter, they separate imperforate from perforate extraxial regions.’
  • 2(of a postage stamp or a block or sheet of stamps) lacking perforations, especially as an error.