Answer :
The lexical rule for definitions violated by the given definitions is that definition 2 did not conform to the standards of proper grammar.
What is conformity to proper grammar?
For a lexical definition to conform to the standards of proper grammar, it must have a definition like any other form of expression.
This implies that the definition should be grammatically correct.
While definitions 1, 3, and 4 are grammatically correct, definition 2 is not.
Thus, the lexical rule for definitions violated by the given definitions is that definition 2 did not conform to the standards of proper grammar.
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