from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A sandwich consisting of a bun, a cooked beef patty, and often other ingredients such as cheese, onion slices, lettuce, or condiments. Often used in combination: a cheeseburger.
- n. A similar sandwich with a nonbeef filling. Often used in combination: a crab burger; a tofu burger.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hamburger.
- n. A similar sandwich or patty.
Short for hamburger.(American Heritage® Dictionary of the English Language, Fourth Edition)
Coined around 1939 from hamburger, due to incorrect analysis of that term as ham + burger and shortening. (Wiktionary)