(1838-1914) a US philosopher, who said that an idea on its own does not have any value, and that there is only value in the results produced by the idea. His most important writings were put together after his death in a book called Chance, Love and Logic.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
Dictionary pictures of the day
Do you know what each of these is called?
Click on any of the pictures above to find out what it is called.