unable to help oneself; weak or dependent: a helpless invalid. deprived of strength or power; powerless; incapacitated: They were helpless with laughter.

What do you call a person who is helpless?

adj.incapable, incompetent; vulnerable.

What is an example of helpless?

Not able to help oneself; weak. The definition of helpless is not able to take care of oneself. An example of someone helpless is a newborn baby.