1.
Someone who is ~ to a harmful drug cannot stop taking it.
Many of the women are ~ to heroin and cocaine...
= hooked
ADJ: usu v-link ADJ, usu ADJ to n
2.
If you say that someone is ~ to something, you mean that they like it very much and want to spend as much time doing it as possible.
She had become ~ to golf.
ADJ: usu v-link ADJ, usu ADJ to n