A solution of continuity in any of the soft parts of the body, discharging purulent matter, found on a surface, especially one of the natural surfaces of the body, and originating generally in a constitutional disorder; a sore discharging pus. It is distinguished from an abscess, which has its beginning, at least, in the depth of the tissues.

Fig.: Anything that festers and corrupts like an open sore; a vice in character.

An open sore on the skin unpasteurised food or drink that has not been pasteurised. Pasteurisation is a process of heating which destroys harmful bacteria

a break in the skin or a mucous membrane. It may be slow to heal and is associated with inflammation.