1.
If you are ~ to something, you become ill or get a rash when you eat it, smell it, or touch it.
I’m ~ to cats.
ADJ: v-link ADJ to n
2.
If you have an ~ reaction to something, you become ill or get a rash when you eat it, smell it, or touch it.
Soya milk can cause ~ reactions in some children.
ADJ: ADJ n