Real Dictionary

mantilla in American English
a woman's scarf, as of lace, worn over the hair and shoulders, as in Spain, Mexico, etc.
noun: a silk or lace head scarf arranged over a high comb and falling over the back and shoulders, worn in Spain, Mexico, etc.

mantilla in British English
noun: a woman's lace or silk scarf covering the shoulders and head, often worn over a comb in the hair, esp in Spain