the quality of being vulnerable (= able to be easily hurt, influenced, or attacked), or something that is vulnerable: You want a doctor who understands the patient's vulnerability. Those who organized the attacks exploited vulnerabilities in the nation's defences.

vulnerability Definitions: Weakness in an information system, system security procedures, internal controls, or implementation that could be exploited or triggered by a threat source.

Vulnerability definition, openness or susceptibility to attack or harm: We need to develop bold policies that will reduce the vulnerability of farmers to drought and floods.

a. Susceptible to physical harm or damage: trees that are vulnerable to insects; b. Susceptible to emotional injury, especially in being easily hurt: a lonely child who is vulnerable to teasing.