Formerly often (now archaic) in proverbial collocation with sore.

figurative. A healing or soothing measure; (now) esp. an ineffective or short-term remedy.

A remedy; advantage.

Misused for: A remedy, cure. Obsolete.

figurative. A means or device for accomplishing something; a pet scheme or favourite remedy, esp. for bringing about some social or political reform…

figurative. A simple, miraculous solution to a complex and difficult problem. Also (Medicine): = magic bullet, n.

An idealized therapeutic agent that is highly specific for the pathogen or disorder concerned. Also in extended use.