Real Dictionary

taco
countable noun: A taco is a crispy Mexican pancake made from corn and eggs, which is folded and filled with meat or beans, vegetables, and a spicy sauce.

taco in American English
a Mexican dish consisting of a fried and folded or rolled tortilla filled with chopped meat, shredded lettuce, etc.
noun: an often crisply fried tortilla folded over and filled, as with seasoned chopped meat, lettuce, tomatoes, and cheese

taco in British English
noun: a tortilla folded into a roll with a filling and usually fried