What is Pain ?
Pain is (noun) 1. a feeling of being hurt If you have a pain in your chest, you ought to see a doctor. She had to take drugs because she could not stand the pain. I get pains in my teeth when I eat ice cream. 2. to take pains over or to do something to take care to do something well They took great pains over the organisation of the conference. She took pains to make everyone feel at home. (verb) to hurt someone It pains me to have to do this, but we must report you to the police. Synonym sadden. Antonym hearten
source: Easier English, Student Dictionary Upper Intermediate Level