"popper" in the noun sense

1. Popper, Karl Popper, Sir Karl Raimund Popper

British philosopher (born in Austria) who argued that scientific theories can never be proved to be true, but are tested by attempts to falsify them (1902-1994)

2. popper

a container of stimulant drug (amyl nitrate or butyl nitrite)

3. popper

a container for cooking popcorn

Source: WordNet® (An amazing lexical database of English)

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