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 ;