1. susceptible to attack

- a vulnerable bridge

Similar word(s): conquerable, unprotected, dangerous, unsafe, insecure, susceptible, assailable, open, undefendable, undefended, compromising, defenceless, defenseless, endangered, indefensible, insecure, unsafe, penetrable, threatened, unguarded

2. susceptible to criticism or persuasion or temptation

- vulnerable to bribery

- an argument vulnerable to refutation

Similar word(s): susceptible

3. capable of being wounded or hurt

- vulnerable parts of the body

Similar word(s): weak

Sentences with vulnerable as an adjective:

- "You are vulnerable to be bullied by someone at school."

- a vulnerable PC with no antivirus software