Benito Mussolini created the word 'fascism.' He defined it as 'the merging of the state and the corporation.' He also said a more accurate word would be 'corporatism.' This was the definition in Webster's up until 1987 when a corporation bought Webster's and changed it to exclude any mention of corporations.
1 is not prime, by definition. 2 is an unnatural prime, 4 is an unnatural prime, and 6 is an unnatural prime. All other natural primes cannot be unnatural primes.
Hash, x. There is no definition for this word - nobody knows what hash is. Famous, adj. Conspicuously miserable. Dictionary, n. A malevolent literary device for cramping the growth of a language and making it hard and inelastic. This dictionary, however, is a most useful work.
There are problems that just end up being really hard and by definition the only problems that come to my desk are the ones that nobody else can solve.
You will never get to the irreducible definition of anything because you will never be able to explain why you want to explain, and so on. The system will gobble itself up.