sore adjective (PAINFUL). B1 ​painful and ​uncomfortable because of ​injury, ​infection, or too much use: All the ​dust has made my ​eyes sore. I've got a sore back. My ​feet were sore with all the ​walking.More examples. 1  My ​ eyes ​ feel really sore.ore adjective (PAINFUL). B1 ​painful and ​uncomfortable because of ​injury, ​infection, or too much use: All the ​dust has made my ​eyes sore. I've got a sore back. My ​feet were sore with all the ​walking. More examples. 1  My ​ eyes ​ feel really sore.