powell Meaning, Definition & Usage

1. noun United States general who was the first African American to serve as chief of staff; later served as Secretary of State under President George W. Bush (born 1937)
   Colin Powell; Colin luther Powell.
   
2. noun English physicist who discovered the pion (the first known meson) which is a subatomic particle involved in holding the nucleus together (1903-1969)
   Cecil Frank Powell.
   

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