Definition of "vulnerability"

vulnerability

/ˌvʌln(ə)ɹəˈbɪlɪti/

noun
countable and uncountable, plural vulnerabilities
1. (uncountable) The state of being vulnerable; susceptibility to attack or injury, either physical or emotional; the state or condition of being weak or poorly defended.
  Quotations
  Again, voice change is not easy and vulnerability plays a big part, but if choral teachers and adolescent singers approach it with the right mindframe, the experience can be empowering, enlightening, and restorative for all involved.
  2019, Bridget Sweet, Thinking Outside the Voice Box, page 71
2. (countable) A specific weakness in the protections or defences surrounding someone or something.
3. (computing) A weakness which allows an attacker to reduce a system's security.