cold sore

noun
1.
a vesicular eruption on the face, usually on or near the mouth, often accompanying a cold or a febrile condition; herpes simplex.
Also called fever blister.
Origin
1905-10
Examples from the web for cold sore
  • He had the beginning of a cold sore in the middle of his upper lip.
British Dictionary definitions for cold sore

cold sore

noun
1.
a cluster of blisters at the margin of the lips that sometimes accompanies the common cold, caused by a viral infection Technical name herpes labialis
cold sore in Medicine

cold sore n.
A small blister occurring on the lips and face and caused by a herpes simplex virus.