The phrase "major deficiencies" refers to significant flaws or weaknesses in something. It suggests that the issues are significant and require attention or fixing. Full definition
Of those violations, 28 were deemed major deficiencies, which place patients in immediate harm. (wxhc.com)
As your home inspector, we are especially looking for major deficiencies that may require costly repairs. (agfhomeinspections.ca)
It also identifies major deficiencies and areas where there is an urgent and outstanding need for improved statistical collection methods. (humanrights.gov.au)