Definitions

1. adjective

most sensitive to touch or a particular stimulus

“She is the touchiest person in the room, easily offended by jokes.”

2. superlative form of touchy

more touchy than others

“He’s the touchiest of all his friends, always on the verge of a fight.”

3. superlative form of touchy

most likely to be annoyed or upset

“This topic is touchiest of all the subjects in the debate.”