The phrase "amend the definition" is correct and usable in written English.
You can use it when discussing changes or modifications to a specific definition, often in legal, academic, or formal contexts.
Example: "The committee decided to amend the definition of 'sustainability' to better reflect current environmental standards."
Alternatives: "revise the definition" or "modify the definition".
Could legislatures amend the definition of corporations so they are not considered a "legal person"?
Google wanted to amend the definition and add a disclaimer about its trademark.
"Google asked the Language Council to amend the definition of the word.
The governor's proposal would amend the definition of "family" and "household" to include people "currently residing together on a continuing basis, or at regular intervals" or those who have lived together in the preceding year.
The man's even voted to "amend the definition of those eligible for the State Children's Health Insurance Program (S-Chip) to include the unborn - while voting against legislation to expand S-Chip's coverage to low-income children and pregnant women at least six times," as In These Times recounts in its August cover story, "McSexist".
In April 2016, the Department of Labor announced its final rule to amend the definition of "fiduciary" under the Employee Retirement Income Security Act.
The S.E.C. should have amended the definition of accredited investor to include other evidence of financial sophistication.
In 2002 I first introduced a bill that "relates to amending the definition of the crime of incest to exclude sexual abuse of children".
The laws and the justice system have to be reformed, including amending the definition of rape, which is currently far from adequate.
The measure had amended the definition of the term "marital status" to include "life partner," thereby granting benefits to same-sex partners of city employees who signed a partnership affidavit.
However, while they may have amended the definition, they have not yet changed the evidence gateway criteria that determines whether victims actually receive the protection of legal advice and representation, when dealing with the consequences of their divorce or separation.
