The term 'Pain Reactions' refers to the physical and emotional responses that people have when they experience pain. The crossword solution for this term is OWS, which stands for 'OUCH, WINCE, and SIGH'. These are three common reactions to pain, with 'OUCH' being an exclamation of surprise or shock, 'WINCE' being a facial expression of discomfort, and 'SIGH' being a deep breath that is often used to express sadness or frustration.