/ ˈbɜːgə(r); NAmE ˈbɜːrg-/ noun
1.
= hamburger
2.
-bur·ger (in compounds) finely chopped fish, vegetables, nuts, etc. made into flat round shapes like hamburgers :
a spicy beanburger
—see also cheeseburger , veggie burger
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WORD ORIGIN
1930s (originally US): abbreviation of hamburger .